I had this issue as well and logging out (in my case, switching accounts) wiping Google app cache, and I think rebooting to make Pixel Launcher refresh, then lo

I had this issue as well and logging out (in my case, switching accounts) wiping Google app cache, and I think rebooting to make Pixel Launcher refresh, then logging back into the YT Premium subscribed account fixed it for me. Convoluted I know, but I think the issue was it wasn't picking up some profile variable or token denoting me as a subscriber. Hope that helps!