There was an app I used to use called Slowly [1]. It's a digital pen-pal application; letters still take a varying amount of time to arrive at your location. I actually still use it, letters between my penpal in Georgia (the Caucasus one) take 3ish days to arrive. If it sounds like your thing I could only recommend trying it out. It has a cool stamp-collecting feature, although that is also what they designed their monetary model around.
Inside me is some drive to write, apparently. I don't think of myself as a writer, yet, for the better part of the last three or four years I've been going between regular journaling, letter-writing, and Midnight Pubbing, so maybe I should reevaluate.
[1] https://slowly.app/