One problem with all Lemmy instances running later version than 0.19.3 is the front-ends are broken with Ungoogled Chromium. Lemmy instances running 0.19.5 essentially force me to use Tor Browser (firefox). This is unrelated to the onion problem but one of my other workarounds is to use a non-stock front-end with ungoogled chromium. So for example slrpnk.net has alexandrite.slrpnk.net, which is an alternative FE. The landing page of slrpnk.net lists a few other alternative front ends as well.

I don’t know if there is a way for users to run alexandrite and then specify another backend of choice. But if not, it could be useful to make other front-ends available on the onion.