If you’re ok with doing some selfhosting, a DNS filter like PiHole or Adguard Home should take care of those. A nice bonus is that these can also block most in-app ads :)

If you setup a VPN like Tailscale you can even make your phone traffic go through a DNS filter you serve at home, so your privacy is always protected.

It looks like the dev is working on porting Tasks to other platforms, including desktop. Though it’s still in development, so not a solution right now.

https://github.com/tasks/tasks/issues/1256#issuecomment-2254357664