Best practice for end user to create template of libraries?

I'm looking for some guidance for an end user SharePoint Online site owner on how to create a new doc library based on an existing one, so it provides the columns (and any column options) and maybe views. This is meant to minimize the rework of creating new libraries in different sites each time it's necessary. Content in the library isn't necessary. Lists offers the "duplicate a list" option, so I'm hoping there might be something that libraries can do too. In earlier versions of (on-prem) SharePoint, stp files could meet the need, but it looks like these are not supported (or at least recommended against) in SharePoint Online. And site columns would have helped if sub-sites are used, but that's recommended against too, so we don't use them. Any suggestions or thoughts are appreciated.