I do recommend including the Filterlists APi to https://api.filterlists.com/index.html
This would make it easier for privacy focused users to subscribe to filter lists.
I don't see any particular issue in implementing access natively in Orion for this functionality.
Users having an easier time browsing filter lists and managing them in Orion. This would help make Orion users safer as it removes the friction to access another site.