If you take the approach of "watch what they do, not what they say", Google is one of the clearest examples of pro-RTO: they invest in so many perks because they want to make the panopticon feel comfy.
There are other companies that don't give you a darn thing and just dangle the loss of one's job as a threat (Amazon), but I think top performers are more swayed by the "free food" approach than the "let's have a big public dashboard with the entire team's attendance" approach (again, Amazon).