The whole reason it is called ARM is because of the joint development with Apple which caused them to spin out the ARM team from Acorn to allow neutral development. Apple started working on ARM basically before the first version(ARM2/3) shipped and used the second generation (ARM6 and later ARM7) in the newton. This is somewhat known in the tech industry and confirmed from multiple sources including wikipedia
Or the whole reason it's called ARM is because it stood for "Acorn RISC Machine", which has nothing to do with Apple. Yes, Apple started showing interest in ARM in the late 80's as a mobile platform. But ARM development began 4 years before Newton development.
Saying it's well known and on Wikipedia is not actually giving a source. I think you're confused about what Apple's contribution actually was. The Wikipedia node on ARM shows nothing to corroborate your claims - only that Apple started working with Acorn long after ARM was first developed. That's not "helping create the ISA." The ISA was developed by Sophie Wilson, not Apple. The spin-off company ARM Ltd is completely separate from the ISA's development.