Performance, that's not really something I was talking about but I'm not gonna deny the fact they may be better performing. However gestures are broken on 3rd party launchers on any android phone since 10. Sometimes they will work near enough find, other times it's unusuably bad. That's still part of being broken, it's not consistently gonna be "fine" on any phone even if it's the same model. I've also had experience with Samsung phones (a51 5g and S20) with these gestures and it's the same with 3rd party launchers on other android devices with gestures I tried (OnePlus Nord, Moto g7 power). Neither has provided a smooth or stutter-free experience. What I'm saying is that if it does for you, that's not unprecedented as I've seen cases of it working fine for some but not for others even with the same model. The truth is, it's still not fixed and it's all on Google, it's not consistently gonna work "well" on different devices and when it doesn't the experience is garbage.
Also another thing, it's simply not down to the launcher developer. They can't do anything to fix this. Nova launcher is a good example:
https://novalauncher.com/faq/gesture-navigation (an old article I know, but there hasn't been a fix. Their discord server has a channel dedicated to gestures and how it's) broken on most android devices (pixels it's a bit better due to an animation API)
Fyi, gestures on 3rd party launchers has been disabled since miui 12.5 apparently. That's likely just due to how much of a buggy mess it is for *many* (not all, some may be lucky) users out there, that it's probably best not to use them
