Working for me, too - I use Dropbox for sync, FWIW. Looks slightly nicer, I think something in the Electron update maybe? at least the sync icon / bar is now green which it was not before. Love it, thanks to the folks that made this build / got things working. Joplin was the major app that was still running on Rosetta / Intel emulation, this should improve performance and battery life for me.
I reported an issue a couple of weeks ago that I couldn't get the Joplin CLI to install on M1, also. Not sure how widely-used the CLI is, though.
I'm also looking forward to an official m1 version. Unfortunately the intel version really works badly, despite what a lot of people are saying. It's slow to respond, it takes many seconds to start and sometimes to takes a few seconds just to switch between notes.
At this point this is the only app I'm using which doesn't support m1. Nextcloud has support for it, tunnelblick, element, discord, signal, dbeaver, even draw io has support for it.