TL;DR: imo - uninstall tailscale, get the apk from the official page and install via adb install
f-droid tailscale is failing because …
panic: binary built with tailscale_go build tag but failed to read build info or find tailscale.toolchain.rev in build info
there’s a bit of history in F-Droid and broken tailscale builds, as there is automation to create releases, but no testing done prior to public release.