If you are a US citizen living outside the US, you are still able to vote!

Register to vote abroad and request your ballot at the links below

If you want something with a decent UI: https://www.votefromabroad.org/

If you want to use a .gov site for trust: https://www.fvap.gov/citizen-voter

Also on another note, democrats abroad have an offical mastodon account

https://mastodon.social/@democratsabroad