SharePoint User Access Permissions

Hi wendraa , which version of SharePoint?

You can change Group Settings, and assign an owner (1 person or 1 AD Group, I can image, you're farm is Active Directory based)

This SharePoint Group, can have some permission level (reader too if you need), and the owner can manage SharePoint group membership without problems (maybe they need direct link to the SharePoint group membership like /_layouts/15/people.aspx?MembershipGroupId=XX , because of they don't have access to site settings, if permission level is reader).

Another way is the follow: instead adding users to SharePoint groups, and manage group membership, think about use Active Directory groups (or Azure AD) . You can then put those AAD groups into the target SP Group one time, and manage Active Directory Groups Membership.

Cheers,

Federico