First of all, thank you all for your help and comments!
Reading your posts, I see it's a bit contrary to what I've read online and even here on the forum. I had understood that a high rise handlebar helps with front wheel control.
With the original Flow handlebar, I’m gaining quite a bit of control over the front wheel, to the point where I can almost pivot 360º on the rear wheel.
Backhops are coming along, but they're proving to be harder than I expected. Although my static balance and hopping (jumping up stairs while using both wheels) have improved a lot, and I can now keep my balance for over 20 steps. A month ago, I couldn't even stay still on stairs without panicking.
Honestly, I’m finding it difficult to do bunny hops (when on my 26'' full suspension bike, I have way more control, but I’ve also been riding it for 10 years and it has suspension). I can jump, but no higher than 35 cm, while I see athletes clearing walls up to 1.20 meters. I still feel like I’ve got a long way to go.
Same goes for the manual—I can't seem to find the balance point. I feel like my weight is too far forward on the bike in general, and I’m not sure if a high rise bar would help with handling and balancing that geometry.
Could someone explain how a high rise bar might negatively impact rear wheel control? Does it help with manuals and backhops?
Overall, I feel quite in control of the bike, but mostly on the front wheel. Maybe it’s because I know I don’t have the rear wheel down yet, and I’ve focused more on the front.
@Szymon I’m 1.75m tall, so I don’t think that’s an issue for me.