Sharepoint permissions

Hi All,I have a SharePoint site, let's call it "tempsite," and I have generated a Client ID using the following URL:

https://contoso.sharepoint.com/sites/tempsite/_layouts/15/appregnew.aspx

I have assigned permissions to the Client ID using this URL:

https://contoso.sharepoint.com/sites/tempsite/_layouts/15/appinv.aspx

<AppPermissionRequests AllowAppOnlyPolicy="true">
<AppPermissionRequest Scope="https://contoso.sharepoint.com/sites/tempsite/"
Right="FullControl" />
</AppPermissionRequests>

I have an application, and I want to use this Client ID within the application to share folders/files with both internal and external users. Additionally, this Client ID should be able to add users to SharePoint groups created within this SharePoint site. These groups are local to the SharePoint site (not Azure AD groups or any Exchange groups, just SharePoint local groups). The users are Active Directory users synced from on-premises to Azure. Could you please guide me on how to achieve this?

If this can be achieved through Azure App Registration(Azure service principal) please guide me with Graph API permissions. The above permissions are not working.