A prime example of this is the GPD G1 which lets you plug a Radeon RX 7600M XT GPU ... eGPU enclosure boasts two DisplayPort 1.4 ports (8K @ 60Hz), one HDM1 2.1 (also 8K @ 60Hz), one USB-C 3.2 ...
It's widely adopted in many laptops and PCs and terminates in a USB type-C connection ... 2 port talk to an external GPU. Homebrew communities have adopted these components with some success ...