Some UK-filmed shows (like House of the Dragon and Industry) are keeping going through the SAG-AFTRA strike, because most of their cast aren’t SAG members, and they were able to film scenes with American actors up-front.

I’m assuming actors like Diego Luna, Kyle Soller and Forest Whittaker are SAG members, but I don’t think they would have been able to use the same tactic, because of the way they film in 3-episode blocks (with different directors), and how much their characters are interwoven with everyone else.