Amethyst has a built in option to route all traffic over Tor, and of course anything on a desktop would be trivial to do this with as well using something like Tails or Whonix. Running a relay is as trivial as installing an app on your phone.

And who doesn't run their own bitcoin node? Lightning I get, but bitcoin-core or knots are as simple as things get, and absolutely imperative unless you're a monetary exhibitionist.