Stop dropdown loop

Hi.

I am trying to create a search form like this image:
https://gyazo.com/843e41fdcc6e98e2ec14dd0368da8e88
https://gyazo.com/d39d30fdf3a8530325ce94252110bd10

Is it possible to have 3 generated dropdowns, where the next two are “disabled”, so that i have to choose the first category, then the next, and the the third.

I want the generation of dropdowns to stop at 3, put a limit on. And these dropdowns also pre-generated, just “greyed” out or just not functional before the parent dropdown is chosen. Is this possible?

Im using vanilla woocommerce, i have tried other plugins, but yours was clearly the best.

I have tried to fiddle around the code, but to no avail. Any help will be appreciated!