@colely I have been considering this for some time now to keep my bones strong, so I sat down and did an hour of research. There are a lot of references to collage for osteoporosis, and wonderfully also some some documented studies. Here are links to 2 of them:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5383229/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8441532/
The common denominators for success seem to be:
Hydrolyzed Collagen containing Types I, II, III, V & X = 5 gram (5000 mg)/ day taken for at least 6 months.
(Also known as Collagen Peptides) Many supplements only contain types I & III which are great for hair and nails, not so much for bones.
Plus:
Vit D 800 iu/day, Calcium 1200 mg/day & Protein 1g/1kg body weight (45 gr of protein/100 lb of body weight)
Research has also shown weight-bearing exercise is needed.

By the way, do you have a measured Vitamin D deficiency? Otherwise, there is no benefit to the higher dose.

With a keen eye, you will be able to identify those with all the types of collagen, and figure out the 5000 mg (5g) dosage. There are hundreds of choices out there, gummies, capsules & powders. (Caution - the gummies seem to contain very little collagen) I have not tried any specific ones yet, so cannot recommend.

Sue