With Gov. Evers responsible for choosing her replacement (including just re-appointing Protasiewicz) even if she is impeached this is likely just delaying the inevitable. Also she won by such a large margin (55-44) that a clear power grab over a popular political figure in the state that will ultimately not amount to much will just hurt R’s even more in 2024, especially under non-gerrymandered maps.
House impeaches -> Senate convicts -> Gov. Evers chooses replacement
OR
House impeaches ~> Senate does nothing leaving Protasiewicz permanently suspended under Wisconsin law -> Protasiewicz resigns -> Gov. Evers chooses replacement
Either way I feel Republicans are just delaying the inevitable here. The only downside to option 2 is that instead of a ten year term, she would get a one year term. But Protasiewicz won by such a large margin already, that it might even boost dems up and down the ballot if she were forced to run again due to these anti-democratic hostile takeovers.