Apple has released the new tvOS 15.4 update and HomePod software 15.4, bringing support for joining captive Wi-Fi networks to the Apple TV and HomePod.
HomePod and Apple TV have picked up support for joining captive Wi-Fi networks

Apple has released the new tvOS 15.4 update and HomePod software 15.4, bringing support for joining captive Wi-Fi networks to the Apple TV and HomePod.
Apple has launched a second iOS 15 public beta, as well as released second betas of iOS 15.4, iPadOS 15.4, macOS Monterey 12.3 and tvOS 15.4 to public beta testers.
tvOS 15.4 lets your Apple TV join captive Wi-Fi networks, which are networks that require additional sign-in steps like in hotel rooms, with a little help from your iPhone or iPad.
tvOS 15.4 adds an Up Next list directly to the Apple TV video player for easier access to your queue of movies and television shows you've started to watch or plan on watching.