This behaviour is documented in the software release notes of the latest version
Do not ask me why Roon has dedided to do this, it would have been nice if they also had indicated why.
On the other hand, on my iPAd, the Edit option is still there:
Please note that my iPad has no wireless connection (i.e. no SIM , only WIFI). If your tablet (iPad or other) has a SIM (slot) it is considered a phone, and in Roon show the same behaviour as a phone)