I assume when he said "installed", that he meant legally through the courts.
The trouble is,is there is no Constitutional path to do that through the courts. And no path to holding a “redo” of a presidential election, either, which Trump says is his second choice. The Electors voted, the votes were duly counted and recorded. End of story, according to the Constitution (which makes no mention of a popular presidential election).
He could be. But, he'll need to do a better job of specifically proving how the "ELECTION IS IRREFUTABLY FRAUDULENT" to quote him, in my opinion. There may have been 2,000 mules in one state, etc, but none of that evidence from a nationwide perspective has ever been adequately gathered, sorted, validated, and presented coherently that I've seen.
There were a couple of projects that got started, on his behalf, back in early 2021, to gather and track that type of information. You can see in my posting history where I was trying to track them. I believe I even created at least one vanity post asking where that type of information was being gathered, which unfortunately resulted in not much being known.
Maybe those projects were hoping that Trump would fund them, but they withered away when he mostly disappeared from sight that year. Not much has changed since then, with regard to a database of what illegal activity supposedly happened, and where, and supposedly by whom.
Without that type of evidentiary information, accusations are cheap, some would say. Did he ever even pursue anything in court after he left office? Some said that would have been the right time. Seems like after Rudy struck out they called it a day legally on went on a PR campaign.