You can create filters based on tag prefix using the following steps:
- Go to your Shopify Admin Store > App > Searchly.
- Click on Filters and select Manage Filters.
- Click on Add New Filter.
- Write filter title in Title field, select Product Tag Prefix in Created Filter Using field.
- Add Tag Prefixes in the Product Tag Prefixes field and click Save.
- Now run data sync by clicking the Data Sync.
Please see this example for reference:
Filter with Tag Prefix: