Because recents recent screen is still handled by the stock launcer even if you use a 3rd party one. And you will always notice more frame drops in animation when using 3rd party launcher.Statement from Nova
They work but not as smooth as stock launcher. Recents screen will always be handled by the stock launcher regardless what launcher you use.
Since gestures don't work with 3rd party launchers, I am stuck with the default one. Hope Google fixes this issue.
Pixelfed dev also announced he wil be building Kbin mobile app. Not sure if that's for Android or iOS.
It's not a failure. People who use it see the value in fediverse. But it will not overtake centralised social networking anytime soon.
This worked for me.