But underneath it's just unicast to your phone, no?

But anyway, beamed directly it may be, it's called beamforming.

In the world of 5G, this is the act of focusing a wireless signal in a specific direction. Compared to simply sending a signal across a wide area, beamforming requires more sophisticated antenna technology.
[...] Beamforming technology, on the other hand, sends a precise and concentrated signal right to your smartphone. It is more deliberate and intentional with its delivery method.

Edit: Forgot source of quote: https://surecall.com/surecall-cell-phone-signal-booster-blog/5g-explained-beamforming-dss-in-plain-english/