@RustyCrab @PNS @rw @soapone LinkedIn is owned by Microsoft and yes, it is sometimes a hard requirement on applications.
A lot of those "easy apply" applications are done by playwright or equivalent scripts and are not actually eligible whatsoever (anecdotes on places like the recruitinghell subreddit mention those jobs get thousands of applicants sometimes where 99% of them are either not qualified or not legally allowed to work in the country of the posting [Indian]).