Oh I'm sure they've got a few more things they're definitely going to try. Like pressuring electors to switch to Trump. That's a long shot, but they will exhaust every dirty trick available to them.
They're no longer even hoping to overturn anything.
Trump is simply using the legal system and the federal government's resources (IOW YOUR money) to get attention and help gin up anger that he can monetize for himself, starting now and continuing long after he's out of office. He's talking to people about charging admission to rallies, keeping the merch pipelines loaded, finding a literate person to write his "Presidential Memoir"
hysterical
etc. etc.
That asshole will continue costing US taxpayers millions upon millions every year he stays alive.