Some developers got a change to look into upcoming Swift Playgrounds 4 allowing iOS app development on iPad with distribution options.
These developers had to sign NDA in order to try the app.
It seems that Swift Playgrounds 4 will be released together with iPadOS 15.2 as it requires this version to run.
Developer:Try new Swift Playgrounds when available. Consider using it for quick prototyping.
QA engineer:Business as usual.
PM/DM:Business as usual.