on the web, I came across the ReveriePaint app, it's kind of like krita, only for mobile devices🤩 https://github.com/LanRhyme/ReveriePaint
Nice, there is also Minipaint which I use online in the Browser in Desktop and Mobile.
https://viliusle.github.io/miniPaint/
I use Krita on desktop, in mobile it's not so good.