I've noticed that in the UK, the British shows commissioned by Netflix such as Who is Erin Carter have been allowed to promote their shows so I assume those are under British Equity contracts.
One things that the New York based shows can use actors doing Broadway shows as the SAG strike doesn't cover them since that's American Equity and they have the likes of Danny DeVito, Daniel Radcliffe, Jonathan Groff etc of course they can not appear out if solidarity but they're not forbidden. Eric McCormack was promoting The Cottage on GMA3 and Morning Joe and no one bat an eyelid.