𪣯 U+2A8EF
S.1.5.i
The description says that it is a miswritten character on the map, thus has no valid meaning itself. According to the pronunciation, it is reasonably believed to have the same phonetic element with the said character, therefore unifiable.

Additional evidence from UTC:

Evidence from Eiso:
清·孫星衍.邢澍·寰宇訪碑錄

Disunify with 𪣯 U+2A8EF.
When I checked the CNS11643 website, U+2A8EF 𪣯 is included in the online version of the standard, which the code is 11-4A26 and the current PUA mapping is U+FA7DC. This character was not included in the 1986, 1992 and 2007 publishing versions. The CNS data shows 11-4A26 is a place name character used in Taipei City (臺北市), the local code is 0x9447, and Taoyuan County (桃園縣), the local code is 0x81D5; the pronunciation is yí.
For UTC-03035, the submitted evidence shows it's a place name used in Jian'ou City (建瓯市), Fujian Province (福建省), and the local dialect in Jian'ou is Min dialect as well. On the other hand, UTC-03035 in the Chinese ancient book is treated as the variant of U+5853 塓, and I can provide other evidence.
Based on the explanation above, U+2A8EF 𪣯 (could be TB-4A26 when HE) and UTC-03035 are both needed in modern Chinese, even both needed in Min dialect/Taiwanese (闽方言/臺語) for different place name, and the pronunciations are different, so they can't be unified without any doubt.

𪣯 U+2A8EF or 11-4A26 in CNS11643 website.

UTC-03035 in 《改併五音類聚四聲篇海》