Manage permissions on library subfolder SharePoint 365

I’m using SharePoint form Microsoft 365

I have created site and added some members. I created a library on it, but I would like that only some persons have access to certain subfolders inside (not all site members). I have read about breaking inheritance, and granting excusive permissions on folders, but, as far as I can see, on 365 I can only do it at library level, not subfolder or item level.

Is there a way to perform this on 365, or using different libraries is the better (or even unique) approach to perform this?