Mine works the same with Big Sur. No delay. Try pairing your Magic Keyboard 2 again by turning it off and removing it from BT, then turn it on again and let it be detected. See if that helps. Also make sure it's fully charged.
Mine works the same with Big Sur. No delay. Try pairing your Magic Keyboard 2 again by turning it off and removing it from BT, then turn it on again and let it be detected. See if that helps. Also make sure it's fully charged.