They are worried
https://www.businessinsider.com/why-trump-cant-be-reinstated-as-president-by-august-2021-6
Once the Electoral College casts their votes in December and Congress counts those votes, as they did on January 6, it's over.
After a president is sworn into office, the only mechanism to remove them is through the impeachment process.
And even if Mike Lindell does blow the cover off a massive plot to rig the election, Congress can only remove Biden for high crimes and misdemeanors he specifically committed in office — not the vague conspiracies about foreign governments and the ghost of Hugo Chavez rigging the 2020 election.
That too wouldn't result in Trump being restored to the presidency.
As Trump knows from being impeached twice himself, the Vice President would take over the office of the presidency in the event that a president is removed.