The repo was taken down because of DMCA: GitHub - Freeyourgadget/Gadgetbridge: We are on codeberg.org now! https://codeberg.org/Freeyourgadget/Gadgetbridge - Gadgetbridge - A free and cloudless replacement for your gadget vendors' closed source Android applications. Supports Pebble, Mi Band, Liveview, HPlus and more.
Is there a official statement what happens with the app?
The DMCA doesn’t affect us other than some links in the metadata are now dead.
For all we know, the source code remains free software and we already flag non-free assets in the app metadata. There’s nothing that should trigger us to remove the app for now.
Upstream seems to be dealing with this, so let’s see how it goes for the next few weeks.
Note that this is not an “official statement” and circumstances might change.
Shhhh 
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I’d rather tought of an official statement of the app developer