Agree with Eiso. UTC-00441 was included in the UTC's submission for IRG Working Set 2021, because U+9FFD (MC-00134) is not yet encoded, but is expected to be included in Unicode Version 14.0, which will be released in September. Shown is U+9FFD from the Unicode Version 14.0 Beta code charts.
According to the document that requested that this ideograph be added to UAX #45 for a future submission to the IRG, https://www.unicode.org/L2/L2018/18064-add-uax45-chars.pdf, this ideograph is the simplified form of U+254DD 𥓝, and that U+2C483 𬒃 is the simplified form of 02778 of IRG Working Set 2021 (aka UTC-03169).
I agree with the UK. This is clearly a katakana ligature, and should be submitted as a regular character, to be treated like U+30FF ヿ KATAKANA DIGRAPH KOTO.
New evidence
This evidence is page 2 of 国字の字典 (1990) that also shows U+30FF ヿ KATAKANA DIGRAPH KOTO highlighted in green.
There are a non-trivial number of ideographs that include jamo as components, and this hybrid katakana (ト) + ideograph (云) is really no different. This evidence is page 2 of 国字の字典 (1990).
Two of the three pieces of evidence, the latest having been added by Eiso, show ⿰口掹 as the glyph, so the glyph will remain unchanged. Will add another comment to change IDS.
IRG Working Set 2021v1.0
Source: Ken LUNDE
Date: Generated on 2024-11-10
Unification
Agree to unify with 𡃤 (U+210E4) per UCV #324
Agree to unify with 僭 (U+50ED) by extending UCV #213
Agree to unify with 擪 (U+64EA)
Agree to unify with 攋 (U+650B)
Further discussion is necessary before unification with 闑 (U+95D1) can be considered
Further discussion is necessary before unification with 憃 (U+6183) can be considered
Further discussion is necessary before unification with 豻 (U+8C7B) can be considered
Further discussion is necessary before unification with 魆 (U+9B46) can be considered
Further discussion is necessary before unification with 猊 (U+730A) can be considered
Further discussion is necessary before unification with 譭 (U+8B6D) can be considered
Agree to unify with 偭 (U+506D); agree to remove NUCV #317
Further discussion is necessary before unification with 墻 (U+58BB) or U+2BBB0 𫮰 can be considered
Agree to unify with 𫝖 (U+2B756)
Attributes
Evidence
Glyph Design & Normalization
Data for Unihan