StreamUnlimited (manufacturer of the NP800 board in naim streamers) released their updated software SDK supporting Tidal Max (Connect) on 12th March.
So add a typical development cycle with betas on to that for full support of Tidal Max in both naim app and via Connect.
Not anytime soon sums it up.
P.S. on the new naim website the naim app is rather grandly described like this:
This application is a breakthrough in terms of sound quality and user experience
Most people who want to fully experience what Tidal offers are likely now using apps like mConnect anyway. Those have no problem sending High Res Tidal streams to NDX2 etc.