Okay, that's a dust cover for the strut. Honestly, I would't be too concerned about that. After a few years and some miles, they all do that.
The dust cover you mentioned is covering the strut rod (which is a shock). It should be fine.
Please feel free to let me know if you have questions or concerns.
Take care of yourself.
Joe
Monday, March 23rd, 2020 AT 7:54 AM