undef and 0mniteck have working versions ready to check out:

As this package can not yet be debianized, it's unlikely to move further for the time being. But here are signed releases from 2 sources, published on a semi-regular release cycle.

# 0mniteck

https://github.com/0mniteck/Signal-Desktop-Builder

## stable: signal-desktop_6.11.0_arm64.deb

deb file: https://github.com/0mniteck/Signal-Desktop-Builder/raw/master/builds/release/signal-desktop_6.11.0_arm64.deb

Signature: https://github.com/0mniteck/Signal-Desktop-Builder/raw/master/builds/release/signal-desktop_6.11.0_arm64.deb.sig

0mniteck Public Key: 0558260a88ff08f8dddf791fe73b9457917830506be3d8dbc1311e8d769c5ac777

# undef

https://gitlab.com/undef1/signal-desktop-builder

## signal-desktop 6.8.0

deb file: https://gitlab.com/undef1/signal-desktop-builder/-/package_files/70632823/download

Signature: https://gitlab.com/undef1/signal-desktop-builder/-/package_files/70632775/download