I have blocked all countries except my region. I want to enable all search engines, how do I do this in the best way?
If you wish to block all but your own region - this more than likely will impact the crawlability of your site by search engine crawlers.
You may wish to implement exceptions into the Custom Rule by allowing User-Agents for said crawlers. These can be found via the respective providers docs - such as: Descripción general de los rastreadores de Google (user-agents) | Centro de la Búsqueda de Google | Documentación | Google for Developers
Thanks 