This is going to be similar to a post on the EU board. After updating to 10, Google VR services/Daydream does not recognize my S9 plus as being compatible for use with the headset. This is verified by other Galaxy/Note owners. Obviously I have been using VR prior to the new update with few problems. Apparently there was an omission of an XML that would alert Google VR services that the phones are compatible for use with VR.
I would recommend reaching out to Google developers for further assistance.
I reported this in UI 2.0 beta for Note 9. Samsung beta team said it was due to beta status but would be fixed in the final version. I installed the final version and it wasn't fixed.
Im so angry about this issue, and this is another reason for me to choose other brand for my next smartphone.
Before I bought S9+ it was Daydream compatible. Daydream compatibility was one of biggest reason why I bought S9+. I also spent money on Daydream, and daydream apps. Now both Daydream and its apps are usseles on my S9+. And I cannot even sell Daydream or ask for refund on apps.
Samsung support pointed me to Daydream developers, but it's not them who removed compatibility code from XML file, Samsung devs did it.
If they dont want to listen I can do the only thing I can: to give my money to someone else.