I'd suggest reading 'Mandate for Leadership' (better known as 'Project 2025') to get an ida of the intended scope of executive branch power under the incoming administration - specifically chapter 2 by Russ Vought, who has just been nominated back to his old job overseeing the Office of Management & Budget.

https://static.project2025.org/2025_MandateForLeadership_FUL...

Of course these aspirations will be challenged in court, but given recent jurisprudence I wouldn't bet on those challenges succeeding.