My favorite show and it gets better with every rewatch. There are so many details in most of the scenes that reference future/past events so I've enjoyed it immensely rewatching it with new partners or friends who haven't seen it.
The time travel gimmick really gets overshadowed by the humanity and the personal consequences of time travel.
I'd also like to recommend The Frog, an Iranian show which was surprisingly high quality and poetic.
Another fantastic non-US: Detectorists, a British show about two dweeby metal detectorists with charm galore and hilarious dialogue. Very wholesome!
Taskmaster drew me in and I binged it all. Now that I've watched the other shows and know the contestants a bit more, it's even more fun to rewatch! Taskmaster is a gem of a show, an absolute casserole!
Deadloch is a great Australian show about a murder in a rural town that was recently taken over by lesbian entrepreneurs and turned into an LGBT-friendly tourist destination. Bit of Mare of Eastown vibes, but more humor.
I really enjoyed Kleo - a German nostalgia show about an ex-stasi assassin dealing with the aftermath of the fall of the Berlin wall in the early 90s. 2 seasons are available on Netflix.
I would also recommend Say Nothing though I don't know if that counts as "non-US" because while the series is set in Northern Ireland and stars an Irish and British cast it is still US produced.
Taskmaster - a British show where comedians and other celebrities compete to complete random tasks. One of the funniest shows I've ever seen. The entire series is on YouTube