I’m still using my '18 Nokia 6.1 and '16 Samsung Tab S2 8". As phone I see no alternative apart from fairphone, haven’t found an alternative yet for the 8" tablet. (There are no 8" left it seems)
Main tablet is a Lineage running Samsung Tab S5e, no alternative found for that. No 10" (or slightly larger) tablet that has an alternative rom. (Or one I can start developing for with another device as base)