In most of the other major android phones we get the option to copy phone number by long pressing an item on the call log screen. Many of my friends have complained about this feature not being there as it takes 3 addition clicks to do the same.
I mean the stable android version just came out and oneUI needs to be build on top of that. The promise is by November or December depending on your device so that's not too bad. Especially considering other Android OEMs
I don't mean to state the obvious but beta kinda means you should expect bugs. You can't be on a beta program and complain and the software isn't working, you should instead be sending bug reports. If you want to wait for a more stable build wait for...