Not to be that person, but (in this case) actually.. From the article:

Trump, a Republican, issued proclamations under the Antiquities Act to reduce their size by about 90% each. He took similar actions during his first term, but those were reversed by President Joe Biden, a Democrat.

.....

Biden designated or expanded more than a dozen monuments and had a goal to conserve at least 30% of U.S. lands and waters by 2030.

Not a big fan of centrists, but credit where it's due, I suppose. Though you are most certainly right that a lot of damage has been done by the Trump Administration that probably won't be fixed.

He can do anything, no one is stopping him.

national monuments can be created (and presumably uncreated) by a presidential declaration under the antiquities act.

Parks and forests require an act of congress and should require a similar act of legislation to undue that- but you're asking if he can do that, and yes. That's because neither congress nor courts want to.

He’s committed crimes his entire life nobody has ever stopped him