firstly: generally on my "small penguin" (very custom samsung ported with ubuntu 20.04 exactly) i have waydroid severely broken (doesn't even open) so no android apps, same with flatpak and snapd (only downloadable .deb's , apt, openstore, maybe appimage, web/pwa or - in worst case - from source works actually).
secondly: tried gimp (from apt) and it'd be usable but only if i connected phone to bigger display and connected mouse, but for normal usage - nope too (like - turns on and everything but ui isn't scaled properly and some menu items i have hidden under screen curves, not saying that it simply crashes after like 15 minutes of work, probably cause of ram/cpu/gpu issues).
thirdly: on laptop i mostly use pixelorama (only sometimes gimp when want to add effects) and for laptop it's perfect but using same thing via web (on itch.io) have problems like no file export and some other glitches (tried on phone web version too but nope).
and what i'm searching for:
for a free pixel editor (think - aseprite/pixelorama) with support of both colorpicker and palettes (either text/image file or lospec) and export to a NORMAL file (png/ico/jpeg/whatev). may be on web, may be ub-touch native, may be "desktop". optionally may have animation/layer support but without it i'm also fine (magick in cli can do gifs).
and best if was touchscreen friendly with multi-finger zoom (imagine trying to tap over 128x128 or maybe even gameboy canvas/tileset without zoom on a phone, heh).
PS:
yep i already searched whole openstore and found nothing.