Only if one candidate doesn’t get 270 votes. Would need at least 36 votes to switch from Biden to Trump. So far there is no indication that any state legislature is going to appoint its own electors. A few legislators here and there might introduce bills but they won’t go anywhere.
I don't believe a Republican held State legislature needs to pass a law. The majority of votes rule and they get their one vote passed on to the House for counting. If a State Repub legislature majority rules - Trump wins since majority States have Repub controlled legislatures. Am I wrong? What am I missing other than threats and Rinos and political careers?