I recently (within the last year) left Apple. 3 days in the office is mandatory for everyone except those with explicit work from home designations registered within the HR system. Anyone with a desk assigned in an office is required to badge at that office on their org's chosen 3 days per week. Most orgs chose T-W-Th.

The difficulty is that folks that had agreements with their management prior to Covid about flexible working arrangements were nullified with Apple's RTO. So, if M and F was your arrangement prior to Covid and your org chose T-W-Th, too bad. Badge-swipes are being tracked and upper management is applying pressure to managers to get their people in the office, regardless of individuals' needs.

So, yeah, it's technically hybrid, but extremely rigid.

Going full time remote is also significantly harder now, as it must be approved by an SVP on an individual basis.

Any of this may have changed in the months since I left, but I've not heard of anything changing from my colleagues that are still there.