If you'd like to grant a specific person admin access rights to a group, module, or the entire platform, watch this video to see the main ways you can grant admin-level access rights.
To learn more about HR Business Partner access rights, please read this article.
If you would like to grant admin access to the entire platform for user:
Navigate to settings > users & teams > edit next to the user's profile > Platform role > Admin > update user info.
Please note: only super admins can change platform roles.
If you would like to grant admin access to specific modules:
Navigate to the settings > admin settings > go into the relevant module settings > 'Grant admin access' > enter the name of the relevant users you would like to grant admin access to for those specific modules > update access.