I agree, to be safe, service the bearing on the wheel.
The inner dust cap is just friction fit onto the axle. A rubber mallet is a good tool for that job.
The other cap is a wheel center cap.
You can buy both types of replacement caps from E-trailer. You do need to know what size you have - there are at multiple variations.
Here is a link to one of the wheel center caps. I think you can also get the center plug that popped off. https://www.etrailer.com/Accessories...bur/319EZ.html
I am starting to think, that I will never be old enough--------to know better.
Tolerance will reach such a level that intelligent people will be banned from thinking so as not to offend the imbeciles. Fyodor Mikhailovich Dostoevsky, Russian Novelist
S.E. Mich. Flagstaff 26FKWS / 2022 F-150 3.5 EcoBoost SCrew Propride