> Any chance Apple would make it possible to compile an iOS app without giving Apple any money?

Absolutely! It's called a "web application", and you can write them in a variety of languages, including compiled ones.

> I want to support my customers, but I don't want to support anti competitive FAANG

It's weird, because English is my first language, but I have no idea what that sentence means. Perhaps you could elaborate?

FWIW, here's the closest I could come to translating it: "I want to write applications that natively run on hundreds of millions of devices, which development for, and use of, directly supports and props up [an anti-competitive FAANG], but somehow as long as I'm exempt from paying them a small annual fee, I'm morally and ethically OK with that."

FWIW I would expect the OP's real objection is having to buy a Mac to develop iOS apps, not the annual fee.

They could buy a used Macbook.

The web on iOS is deliberately gimped.

If you mean not buying a Mac, I heard that is possible by virtualization of mac OS using some QEMU/KVM Hack.

I don't know if it needs modified builds of OS. if so, stay away from that..