Hi @Audi86 ,
Unfortunately, after my research, there is no out-of-the-box way to hide "site settings(Site contents/site usage)".
As a workaround, you can grant "restricted read "permission level instead of read permission.
This will hide site contents and clicking on the site usage will show "You need permission to access this site".
Here are steps:
- Enable the "Limited-access user permission lockdown mode" Site Feature (Site Settings > Site collection features > Limited-access user permission lockdown mode).
- Grant "restricted read "permission level instead of "read" permission.
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