While I ended up buying the Skycrop HD HDMI 2.1 switch because it supports HDMI 2.1, it also supports other resolutions, including 8K/60Hz (for the three people that own an 8K TV) ...

Plugable's 3-in-1 Thunderbolt 4 dock comes with an additional adapter, and it's on sale for $75 (was $130) on Amazon.