Do note that if you use mixitup, you’ll have to initially load (display) ALL items in the collection for the custom code to “filter” later on, as mixitup is a client-side script.
If that’s the case then using MixItUp’s select-dropdown won’t really help me. Then how can I make a page where people can explore and filter items from a CMS Collection? If I have 1000+ items to display am I really forced to display them all at once if I want users to be able to use a filter?