You linked to the physical buttons and the membranes that pop them back up / close a circuit when they’re pressed down. As was the case with your Steam Deck, ‘clicky buttons’ are going to be a replacement for the actual circuit component.

Looks like it’s going to be a much more complicated piece of kit for ExtremeRate to design:

www.ifixit.com/Guide/…/215325#s431737

Since it’s all one piece, it’ll likely end up being a single kit that does the DPad and Face buttons, and maybe even the rest.