Rather embarrassingly, I’ve only just discovered that UIkit3 has it’s own search stack.
Drag it to the page and it will connect to Rapidsearch Live for database-powered searches.
Don’t have Rapidsearch Live? No bother, it has its own built-in system whereby you add your own page title, page description and tags, along with a link to the actual page, for each page on your site, and boom, you’ve got yourself an instance site search.
I’m mentioning this as I’d consider myself a bit of an advanced user of UIkit, as I’ve used it since launch and built loads of sites using it, but I never spotted the search stack!