There are multiple references to joint ailments after Covid vaccines. One at Cureus titled "COVID-19 Vaccine-Related Arthritis: A Descriptive Study of Case Reports on a Rare Complication" gives references to some studies. It says "Although not yet frequently reported, joint-related adverse effects following COVID-19 vaccination can definitely occur."

Another article with references at Cureus titled "Inflammatory Arthritis Associated with COVID-19 Vaccination" says "Inflammatory arthritis is an increasingly recognized rare adverse effect of COVID-19 vaccination and clinicians should actively consider this in patients with new or flares of inflammatory joint disease."

Unfortunately I can't yet post links, so can't direct you to them. There are others if you search.