From my understanding,
as written, any private use drones currently in the U.S. will not be affected by this. Meaning our drones will be able to continue to operate without a problem. Some rules have already changed for government funded agencies. They have already been told if they receive federal funds, they cannot buy new DJI drones. For us, though, we can buy a new DJI drone
IF it is already here before the ban is sign into law. I don't fully understand the sunset part either. But usually things get "phased" out to give companies, agencies who wish to comply with the ban time to buy other drones.
If you haven't yet, here's a thread with an article in it that is very helpful.
The truth about the Countering CCP Drone Act