WordPress AJAX Search Bars

Summary
I need to make 3 search bars on a WordPress site fully functional (see attached screenshot):

Search by Store Name

Search by Region (Nomos)

Search by City

Requirements

AJAX search (no page reload) with live results.

Three independent fields that can also be combined (e.g., Store Name + City).

Must search a Custom Post Type “Stores” with fields:

Title = Store Name

Taxonomy/Fields: Region, City

Greek-friendly search: handle accents, case-insensitive

Fast response

Clean UI for results in a grid (image, name, key info).

Fallback: if no exact matches, show related results.

No conflicts with theme or page builder (Avada / Block Editor).

Deliverables

Ready-to-use code (small custom plugin or theme snippet) + installation instructions.

Setup for CPT & Taxonomies (using ACF / CPT UI or native).

Shortcode/Block + parameters (e.g., [store_search placeholder_name="" placeholder_region="" placeholder_city=""]).

Accent-insensitive support for Greek.

Basic testing with sample 20+ entries.

Short README file.

Nice-to-Have (Optional)

Suggestions for caching / pre-indexing for faster search.

Results mapped on Google Maps with markers.

CSV import template for stores.