Search System Needed - Wordpress Dynamic Site - Architect and Implement

I have the following tech stack and need a sitewide search solution, open to any suggestions and implementation. Stack: - Dokan multivendor, including product types, Auctions, Bookings, Simple, Subscription - Geodirectory with 5 CPTs; Events, Business Listings, Classifieds, Local - WPforo Q&A - Buddyboss Solution: Provide a singular or multi-pronged solution for search, and proposal to implement. Lowest bid, technically sound will win.