@Renata_Walker unfortunately you’re not able to do that out-of-the-box (yet) without some serious work to glue that all together yourself.
You can do creative things like using lookup tables by getting the user id when the membership is created and storing it in Airtable.
Then create a unique CMS item for each member.
The lookup table would be the association between the item id and the user id.
The CMS Collection could be gated, but not each individual item (user).
So the typical approach is to give each item a slug filled with random numbers.
Example: https://pages.webflow.io/users/458uryfh487376fdjksdhdjf8476347
It’s unlikely anyone else would find that.
Again, doable, but not simple and straightforward.