Now Riley Testut, the developer behind the alternative app store Altstore, has discovered that Apple has added support for the feature in iOS 14.2. It started in beta 2 of the update, but has also been included in the final version and therefore seems to be at least semi-official, reports 9 to 5 Mac.
At Altstore, you can find apps that are not allowed on the App Store, such as emulators for various old video game consoles. These can now start to benefit from jit compilation, which makes it possible to emulate much more powerful systems than before. Riley Testut points to systems such as PS2 and Gamecube. A beta version of Altstore with support for the feature has already been released to those who support the project via Patreon.