A few of those arguments don't require evidence, since they were matters of law vs. matters of fact.
One of the arguments made was that laws passed by legislatures weren't followed, for example the deadline for mail-in ballots in PA, which was extended until 5 P.M on November 5 even though the law on the books is explicit that ballots postmarked after election day were invalid. The fact that a court upheld the view in contradiction with fairly plain language of the law caused some controversy.
The above doesn't mean "The election was stolen". It doesn't mean it would have turned out differently. But I think there is some room for debate. Even though Trump is aggrandizing the issue politicians do that all the time and aren't de-platformed for it.
One of the arguments made was that laws passed by legislatures weren't followed, for example the deadline for mail-in ballots in PA, which was extended until 5 P.M on November 5 even though the law on the books is explicit that ballots postmarked after election day were invalid. The fact that a court upheld the view in contradiction with fairly plain language of the law caused some controversy.
The above doesn't mean "The election was stolen". It doesn't mean it would have turned out differently. But I think there is some room for debate. Even though Trump is aggrandizing the issue politicians do that all the time and aren't de-platformed for it.