Rear Bumper shocks, not suspension. After a rear end collision, need to replace? on 2002 Volkswagen Beetle

Had a rear end collision in 2002 New Beetle. The shocks in the rear bumper did deploy, contracted to absorb the hit, then returned to original position. Have seen that the bumper shocks must be replaced after collision. They are only good for one incident. Insurance Adjustor does not seem to know this. Any comments? Ideas?

Asked by for the 2002 Volkswagen Beetle
I would contact a good German Shop that really knows VW and ask them, because I am not sure.

here are some shops: