Your link does nothing to address OP’s claim. Reclassifying marijuana requires only the stroke of the president’s pen. Biden chose not to do that.

Apparently not, or Trump would have done it earlier, too.

There were investigations into just what reclassification would mean for other regulations, laws and treaties. These were begun during the Biden administration and are now being finished. If you just say "weed's schedule III now", without any other modifications to policy, you'll have confusion over just what that means to a bunch of different federal, state, and local agencies.

Also, you don't want a President just doing things with the stroke of a pen. Actually, that's our biggest problem right now, letting an autocrat piss all over separation of powers as a treat.

No, it requires more than a stroke of the pen, and the stroke of the pen that was required happened in 2024. It's been DEA foot-dragging ever since, which is what Trump's executive order last year addressed.

Biden didn't want to reclassify it because there's really no point in reclassifying. It's still illegal to possess for recreational use and requires a controlled substance prescription from a doctor.

It would take a law to remove it from the control substances scheduling, no president can do that. Which is also why Trump didn't do it. (It's now schedule 3 instead of schedule 1)

Surely the SCOTUS stopping everything Biden did and approving everything Trump does doesn't have anything to do with it.

Common russian disinformation talking point. I'd rather have elected bodies representive of the people within the states to decide rules for the country, not the equivalent of a post-it note with a possible 4yr expiration date to shove through your own agenda and trample over the will of the people. Fixing the system is correct, using inappropriate measures to take shortcuts for short term wins to fool voters on progress is a fools errand. Biden took multiple steps in his terms to correct this, no need to frame it intentionally dishonestly.