Suggest not to unify if no more cases can be found because both ⿰虫肴 and 𧍂 (U+27342) are kind of common as head characters in ancient books.
Examples for 𧍂 (U+27342)

改併五音類聚四聲篇海，成化丁亥重刊本

同文书局版《康熙字典》

新校經史海篇直音，明嘉靖刻本

續字彙補，和刻本

字彙補，彙賢齋本

SJ/T 11239-2001 信息技术 信息交换用汉字编码字符集 第八辅助集

中国测绘科学研究院：库外字代码对照表

SJT 11239-2001 信息技术 信息交换用汉字编码字符集 第八辅助集

I suggest not to change the G-Source reference because GCCYY is actually a dead source reference. We are editing dictionaries which will include part of GDM characters and I am making a website containing all information of GDM characters I have. Everyone can access to the website in future.

文清公薛先生文集 mark

新刻洪武元韻勘正切字海篇群玉，明崇祯刻本

遵古本正韻石齋海篇，明崇祯刻本

越喃汉英四文对照新辞典，邓应烈 何华珍，上海交通大学出版社，2023年，page916

It is OK to keep the character so that Vietnam can add V source reference later instead of waiting for another 4 or 5 years.

舒大刚，杨世文 主编：廖平全集 10，上海：上海古籍出版社，2015年5月

東方雜誌.第32卷·Feb.1,1935,V.32,Num.3

東方雜誌.第32卷·Feb.1,1935,V.32,Num.3

新刻洪武元韻勘正切字海篇群玉

遵古本正韻石齋海篇

新修絫音引證群籍玉篇

It seem to be a corrupted form of 坛. It may be better to postpone for further investigation unless more evidences are provided.

Please explain why the shape is more important than others.

Please explain the shape of this character.

八卦 with 雨+鬼

八卦 with 鬼

The amount of this kind of characters is only 8*number when talking only the 8 Diagrams(八卦). But the amount will be big if all the 64 Diagrams and the 8 Diagrams(八卦) are considered. The amount will become 72*number(雨、雨+鬼、鬼、雨+食、雨+口……)

Please explain the shape of this character.

Please explain the shape of this character.

Shape unstable.

开摄化（開攝化）is a combination of 開 and 攝化. 攝化 is a religious word used by the Buddhism and Taoism. 攝化 means using the light of Buddha's compassion to inspire and save suffering beings. 開（Start）攝化 then means the start of 攝化. 雨+鬼(the evidence on this page)/雨/鬼/口 can be added to 開攝化.

Please explain the shape of this character.

Please explain the shape of this character.

Please explain the shape of this character.

知化 is a word meaning the understanding of the principles and changes of the world.
"得達悟真常" has the same meaning.

Part of this, not a character

The context says 於左、右、上、下⿱丅冂内令書(Write the thing below in ⿱丅冂), i.e.

合明天帝日 is a special word of the Daoist. The order of 合明天帝日 with 雨 and 口 in 《廣成儀制・鐵鏆施食集》 is wrong (合天明帝日).

More information:
https://www.douyin.com/zhuanti/7249837737812117562

https://hc.jsecs.org/irg/ws2021/app/?id=00265

http://www.ctcwri.idv.tw/CTCW-CMTS/CMT02%E6%B4%9E%E7%8E%84%E9%83%A8/CMT0202%E7%A5%9E%E7%AC%A6%E9%A1%9E/CMT0202ALL/CH020202%E5%A4%AA%E4%B8%8A%E6%B4%9E%E7%8E%84%E9%9D%88%E5%AF%B6%E7%B4%A0%E9%9D%88%E7%9C%9F%E7%AC%A6/CH020202-1%E5%A4%AA%E4%B8%8A%E6%B4%9E%E7%8E%84%E9%9D%88%E5%AF%B6%E7%B4%A0%E9%9D%88%E7%9C%9F%E7%AC%A6%E5%8D%B7%E4%B8%8A.htm

Another page only with 口

合明天帝日 is a special word of the Daoist. The order of 合明天帝日 with 雨 and 口 in 《廣成儀制・鐵鏆施食集》 is wrong (合天明帝日).

More information:
https://www.douyin.com/zhuanti/7249837737812117562

https://hc.jsecs.org/irg/ws2021/app/?id=00265


A more common form
http://www.ctcwri.idv.tw/CTCW-CMTS/CMT02%E6%B4%9E%E7%8E%84%E9%83%A8/CMT0202%E7%A5%9E%E7%AC%A6%E9%A1%9E/CMT0202ALL/CH020202%E5%A4%AA%E4%B8%8A%E6%B4%9E%E7%8E%84%E9%9D%88%E5%AF%B6%E7%B4%A0%E9%9D%88%E7%9C%9F%E7%AC%A6/CH020202-1%E5%A4%AA%E4%B8%8A%E6%B4%9E%E7%8E%84%E9%9D%88%E5%AF%B6%E7%B4%A0%E9%9D%88%E7%9C%9F%E7%AC%A6%E5%8D%B7%E4%B8%8A.htm

Another page only with 口

Another page only with 口

Another page only with 口

No more evidences can be found.

喱兛

天心帝讳（结讳密旨）,This one plus 雨
https://hongyeshan.com/post/54339.html

I still do not suggest IRG to encode the characters in this way even all characters will be finely collected and submiited one by one in future. There will be at least 10000 characters to be encoded in this way. Supporting all Daoist characters will become unnecessary burden to most devices if there is a certain number of Daoist characters encoded in future. This may lead to that national bodies and companies stop trying to support the whole CJKUI character set, which may cause more unexpacted problems.
I stick to my opinion although I must repect IRG's decision. And I will suggest Chinese government not to support these characters in future version of national standards.

开摄化（開攝化）is a combination of 開 and 攝化. 攝化 is a religious word used by the Buddhism and Taoism. 攝化 means using the light of Buddha's compassion to inspire and save suffering beings. 開（Start）攝化 then means the start of 攝化. 雨+鬼(the evidence on this page)/雨/鬼/口 can be added to 開攝化.
If IRG is going to encode them one by one, then please prepare to be criticized for it and overwhlemed by this kind of characters.There are countless words used in Taoism and many of them can combine with 雨+鬼/雨/鬼/口/尚……
I have stated the problems very clearly in my proposal IRGN2518 and experts gave their opinions about Daoist characters in IRGN2579. But none of the proposals change IRG's decision, which was very frustrating. In the last IRGmeeting, I was stopped by other experts saying there is no problem in encoding most of Taoist characters submitted in IRG WS2021, which was also disappointing.
I was planning to write another proposal about the characters but finnaly decided not after more upsetting things happened. I realized that I don't have the time, knowledge and the patience to change the situation. So this will be my last comment on Daoist characters in IRG.

知化 is a word meaning the understanding of the principles and changes of the world.
"得達悟真常" has the same meaning.

鶴

缻