I have 2021 MBP 14" M1 Pro with two 32" LG displays connected via USB-C. Here is what you need to do: Disconnect Display 2 from your Mac With one monitor connected unplug the monitor from the power for couple of seconds and plug it back in. Display 1 should now work. Disconnect Display 1 from your Mac Connect Display 2 to your Mac Unplug Display 2 from power and plug back in Display 2 should now work. Plug in Display 1 and they should both work now! Cheers, Juha