The evidence should be considered unbelievable because the character is of great possibility created by the author in modern times and never actually accepted or used by other people.

The traditional character 𬧄 has been encoded in Extension C and seems to be also used in Min Nan. So I think this source can be accepted as sufficient proof of the existence of the simplified form.

U+2C9C4 𬧄

kCantonese gung3