you can use the program to convert your ipa's png to normal png file.

If this tool can help you, please don't forget to star me. :)

I just try the 8 bit file, when you have some problem for use it, please tell me.

go run main.go -i input.png -o output.png

ios png fix version: v0.0.1
Usage: nginx [-h] [-o filename] [-i filename]

Options:
  -h    show this help
  -i input
        set source ios png input file
  -o output
        set fixed png output file

CgbiPngFix is completely free. Please mark the source of CgbiPngFix in your commercial product if possible.

pngdefry - https://www.jongware.com/pngdefry.html