AI Search team's been working with the Sharepoint team to offer more options, so that devs can get best of both worlds. Might have some stuff ready for Ignite (mid November).
No we have a Microsoft graph connector which inserts externalitems into graph, copilot is able to surface these, probably via the same semantic search database
The capability was there for years, but it was expensive - something like $0.60 per 1000 items indexed, then sometimes after copilot was added it became free for up to 50 million items, and now it's free for unlimited items - you just can't beat that for price... https://techcommunity.microsoft.com/blog/microsoft365copilot...