Yes. Via the new age verification laws which require any site with a considerable amount of 18+ content to verify their users are 18+. This has passed in a few states. Leading Pornhub, and some other porn sites, to block access from those states.

The age verification laws are written pretty broadly and could be used to target a wide variety of content. Not just porn. Anything the state deems 18+ would require age verification.

These laws are facing some court challenges. If we're lucky, the laws will not survive.