DeSantis has been deeply critical of the efforts to investigate the causes of the January 6 riot. That seems to be the default GOP position; neither express support for nor condemnation of the rioters, but blame the Democrats for trying to use January 6 as a wedge issue. This approach maintains the facade of unity between the pro- and anti-riot factions of the party, which is viewed as a necessary step to regaining power.
The Democrats need to pin him down. It should be asserted as often and openly as possible that he supports the rioters until he makes a clear statement to the contrary. Make him prove that he is willing to suffer the consequences for standing up for the Constitution and the rule of law. Is he? I doubt it.