Glyph should follow the one in the evidence, and please show more evidences to determine the character shape.

The element on the right is a simplification of the characters 沒 / 没, read "một", through these steps 没 > 𠬛 > 𠬠 or 𱥺 > 𠬠. There are 2 basic forms, 𠬠 and 𰰝. This is documented in the character definition shown in the image below from TĐCNTD p. 802



Below is an example of VN-F0CBC from "Lục Vân Tiên" showing a form somewhat between 𠬠 and 𰰝



Historically, there are many examples of 𰰝, but the current trend is to standardize on 𠬠, as shown in this the "BẢNG CHỮ HÁN NÔM CHUẨN THƯỜNG DÙNG" http://www.hannom-rcv.org/NS/bchnctd%20300623.pdf