So i just found that the "SnowHaze" browser prevents fingerprinting on fingerprint.com and https://browserleaks.com/canvas

• https://apps.apple.com/nl/app/snowhaze/id1121026941?l=en

• https://github.com/snowhaze/SnowHaze-iOS

Note that there's also:

  Settings > Safari > Advanced > Experimental Features

where you can disable OpenGL and such (i haven't tested yet.)

That I can relate to, but the more immediate question is whether you are willing to adjust your habits to nullify its impact. Most people would not.