Product Filter & Search Integration Guide
If you're using Product Filter & Search by Boost Commerce, you should follow this guide to hide the dummy products generated by BYOB.
By default, BYOB hides all dummy products from the theme search. Regarding the in-app Instant Search widget of 3rd party apps, it will not be effective.
You have to use the built-in tool named Product Visibility, which allows you to hide some products from collections/instant search/search results page. It's under Tool => Product Visibility
Just hide all BYOB dummy products with a tag called " BYOB hidden" and it'll be ok