In this case, a three-port HDMI switch is used with three inputs for source components and one HDMI output to the TV. When multiple TVs are used, there are HDMI switches with two or more outputs.
Right now, the most popular standard for PC and TV video interfaces is HDMI 2.1, but we can soon expect a switch over to HDMI 2.2 — and that switch is apparently coming sooner than expected.
What's more, it's the model that comes with a HDMI adapter for TV play ... The Nitro Deck+ is one of the best Nintendo Switch accessories and indeed one of the best Nintendo Switch controllers ...