Regarding Android, if you install the Obtainum APK, you can then easily install the APKs for Phoenix and/or Blixt wallet, both actively-maintained open-source Lightning wallets.
Obtainium checks for updates, so it acts like a personal app store. For what it's worth, I love Obtainium!
- https://github.com/ImranR98/Obtainium
- https://github.com/ACINQ/phoenix
- https://github.com/hsjoberg/blixt-wallet
The only maintained Linux bitcoin wallet with Lightning, that I know of, is Electrum wallet. I don't know how up-to-date their Lightning implementation is.