Even though a team is linked to a Sharepoint site, when you attach a document within a team channel, you can only browse documents within folders linked to Teams channels. I know the user can browse to the Files tab but this is much more cumbersome than being able to browse and attach a link to a conversation from the paperclip icon. Is this on a roadmap does anyone know?
I'm not particularly aware of a coming change as the one mentioned. You can go to Teams User Voice and check if the idea has been already posted and vote for it. If that's no the case, post it so others with the same requirement can vote