Update the stable client does have proper virtual file sync.
Regarding the previous virtual file sync system (.nextcloud) you had to enable experimental features to get it. The latest stable just has both versions of syncing and I missed the obsious vfs sync option.
The only downside to the new system is there isn’t a make file/folder available offline always option in the context menu (you can get around this by manually setting up synced folders but it is a little inconvient).
Update regarding virtual files has more quirks.
Also turns out the reason it was a github release was it is still in alpha 😅 .