Hi, we are planining to migrate from tags to metafields for filtering. But is really strange that we can filter product in collection with metafields. So it will be double care to add same tags as metafields. It would be great feature @Shopify_77
If you are looking for a solution to automatically convert tags to metafields. You can check it here: https://community.shopify.com/c/online-store-and-theme/copy-product-tags-to-metafield/td-p/1451484
Else if you are looking for filtering, if you are not against 3rd-party apps, you can take a look at this app https://apps.shopify.com/ultimate-search-and-filter-1
It can filter products using product data such as tags, options, metafields, collections, and SKUs…
It also supports using metafield as a range filter too.