There are several things that can cause what you seem to be describing. Do you know if they replaced the strut mount - item 11 in the pic. You have a strut mount, spring seat item 10 and insulator item 7.
The strut mount is located at the top of the strut assembly and is the mounting point for the strut. It is recommended that you replace the strut mounts any time you replace your strut assembly. If the mount is defective it allows the strut to bounce and make a sound like you are describing. The other parts need to be in good working condition to prevent metal on metal. Another possibility it once struts are replaced it is a good idea once the car is off jacks and resting on the tires, to ensure the strut mount nuts or bolts on top are tightened to the correct torque. If not, the strut will bound and hit the body making a noise. Additionally, it may sound wild, but there are times you can have a defective shock that is bouncing too much even though new. I recently installed new shocks, mounts, insulators, and spring seat. I still had a slight noise. Replaced the shocks again within a week and the sound was gone. This was a good name brand shock. Just sometimes that happens.
Also check the end links on the sway bar, item 12. The rubber does wear out, get torn and can move around.
My advice is to have the shop replace the mount, spring seat and insulator and maybe even the shock it they will. It should be under warranty. Hope this helps.
Thank you for the donation
Saturday, August 15th, 2020 AT 9:53 AM