5G CSS is harder yes, but keep in mind that most 5G is the 5G_NSA variety, and is really just riding on the same cell bands, no mmwave here. You probably notice that your phone often slips out of 5g, or you inhabit different modes here.

Essentially, 5G is sort of a lie. Phones spend a lot of time exchanging information via 4g/lte, and just like 2g/3g and 3g/4g, there are simply downgrades that can be performed in the field, without getting too far into the weeds.

5G matters not for this.