Transparent images losing transparency

[u/KenjiToshiiko]

I used ibis paint on my phone and download it as a png transparent background but when its in the photos app it loses its transparency. When I shared the image to my friend on her phone its transparent for her. It isn’t because I have optimize phone storage on either, I don’t have it on. I tried pretty much everything.

Please let me know if you guys have solutions 🙏