I dunno exactly to do this consistently but here's a success

Yeah, I do this jump in my Any% Chapter 1 WR, and it is definitely a tough one. The key is after getting onto that wall you got to, to fast falI and jump as late as possible over to the other side. It's very tricky, so I can go through and make a more detailed tutorial later if that would help.

Yeah, I messed up the wall slide but typically I can get that, getting on to that wall is crazy hard though. How did you find it out in the first place? or did you learn it from somewhere

Yeah, getting on the wall has been extremely finnicky for me in the past. You have to be as close as possible to the top of the left wall when you do your wall jump, and you have to make sure to hold away from the wall before wall jumping, since that gives the most height (for some reason there seem to be two different types of wall jumping: one that gives more horizontal speed and one that gives more vertical height. For the vertical height one, you have to hold away from the wall right before jumping. It will make a different sound than if you jump while holding towards the wall. If this is unclear, I can make a quick video demonstration).

As for where I figured it out, I found it on my own. I theorized that it was possible to get up there and then make that tricky wall jump up to the O2 tank, and that it would be slightly faster than doing it normal way, so I grinded it out until I did it. It is far more useful in All Gems though, so it is definitely worth learning if you're thinking of perfecting the level.

Wow, that's awesome, thanks so much for the tip. I've gotten a setup using the seaweed on the ground to get the highest possible on the wall but I haven't been holding away from the wall I want to land on.

Imma have to get to grinding, I need a sub 3:40 all gems.