Depends on the routes. Most non-US airlines still offer free alcohol on trans-Pacific flights. Lufthansa offers free beer and wine on trans-Atlantics.

Lufthy even offers free alcohol in coach on intra-EU flights.

American Airlines offered alcohol on the Dallas <-> Buenos Aires route as of last month, like every other long distance flight I've been in.

I flew economy from London to Mumbai with as much booze as I could handle, both directions. There was some sort of ban on serving alcohol in Indian airspace, but outside of that they were happy to keep giving me tiger beer until I fell asleep.

I have never been on a flight between Asia and the USA that didn't offer free alcohol, but then I don't drink and never take it anyways.

Singapore Airlines even had Singapore Slings, which are pretty good.

Air France has free booze in any class.