That is not what the OP wanted: He wants to share is NC data via SMB.
What I read/understand from this is: He wants to create a SMB shared folder from He's NC data (via OMV or whatever) and access it on a different PC.
The NC data will have special permissions that won't move to SMB.
It's true. Unable to access Nextcloud data with samba. But if samba data can be accessed from Nextcloud. It's what I've always said.