If Lindell had proof a foreign power altered votes in 2020, he would be a national hero. If he wanted to sell pillows he could be as even richer, but he could just as easily run for the Senate and win.
If anyone has proof, the easiest way to advance it would be to post it online, where it can be vetted by many people. You would have your share of cranks, but there are enough people with knowledge to reinforce the proof and and get the conversation into the media. For example, when Free Republic exposed forgeries covered by 60 minutes.
The fact that Lindell is not releasing this information (at least as of now) so that it can be peer-reviewed makes sense only if he doesn’t have proof. If he releases information that aligns with generally accepted reality (the incorrect types faces used on 60 minutes), he may be President some day.
He is releasing the data so others can check. Either you are not watching it or lying.