On Governor Whitmer:
Her legal excuse for continuing mask mandates, restrictions on capacity and gatherings, and the like is that she isn't the one issuing them anymore. Now it's the Department of Health and Human Servces and the Occupational Safety and Health Administration.
Someone is doing something about it, namely suing the director of the MDHHS for overreach. There will doubtless be more lawsuits against the MDHHS and MiOSHA.
Realistically speaking, she's not going anywhere until 2022.
Impeachment would require 4 Democrat state senators to turn on her and 16 Democrat state representatives to turn or lose their seats this fall (Senators aren't up for reelection until she is).
Recall is not feasible. It would require over a million signatures in 60 days to even start the process. There are at least two groups with competing petitions, who aren't working together.