I don't understand the question. Maybe you could give an example of the sort of metadata you want to share.

I recommend these article for discussions of how to share when you can't share all your raw data publicly because of participant privacy:

https://www.nature.com/articles/s41586-020-2766-y (I am a co-author)

https://www.nature.com/articles/s41576-020-0257-5

There's some more discussion in the article linked in the parent to but it's mostly not about that.