@arpie might be able to help as she takes Exemestane tablets.
I think all of us on hormone therapy experience joint/ bone pain with possibly those who have had chemo previously seemingly having a harder time.
There are things we can suggest to alleviate it a little.I have taken Krill oil tablets from the beginning as well as 6 monthly Prolia injections and Vitamin D3.I started with osteoporosis and an osteoporotic fracture .My joint problems improved after a few months of starting the day like I was 90.I also pushed thru it by daily one hour walks since the start.Movement definitely helped.
I expect others will join in and provide their thoughts and suggestions.I tend to think joint / bone problems from the drugs may attack areas where we have preexisting issues.
I take Letrozole.