As the author of the codeberg issue for this, it hasn't been added yet. I really liked the custom thumbnail feature when it was added to lemmy, so I haven't forgotten about adding it to piefed. A big focus of my devwork recently has been on the api-side to help make apps/frontends more complete, so we will get there. I just added the issue to the 1.3 release kanban to make sure it is prioritized.
wjs018
joined 1 month ago
Like Blaze mentioned, it's a whole different instance, running a different, experimental version of the code. It's the instance we use for testing features for the next version of piefed.
If you want to make an account, feel free to register (I try to check registrations often). However, due to its testing nature, it might be a bit unstable and could not play nice with some mobile apps.