Here's a paper discussing Covid's impact on bone metabolism:
https://pmc.ncbi.nlm.nih.gov/articles/PMC10912131/
It's lengthy but here are a couple of paragraphs from the paper that summarize the impact.

"Emerging research suggests that SARS-CoV-2 infection may have significant effects on bone health, potentially leading to bone loss. Two studies identified hypocalcemia, characterized by low blood calcium levels, as a prevalent condition in SARS-CoV-2 patients, and low levels correlated with increased disease severity and worse clinical outcomes [75, 76]. A third study found SARS-CoV-2 infection altered bone turnover markers, suggesting that even moderate severity of SARS-CoV-2 infection could impact bone health and potentially lead to bone loss, even without concurrent hypocalcemia [77•].

These findings increase concern that SARS-CoV-2 infection may have long-term effects on bone health, underscoring the importance of evaluating patients’ bone turnover markers and fracture risk post-recovery."