Hi @laure,
Thank you for buying our theme. We hope it will meet all your expectations. 🙂
Unfortunately, this feature is not available with BuddyPress and to our knowledge, there is no plugin that you could install to add this feature to your website. We think that this feature requires custom development work. In consequence, our recommendation is to hire a freelancer to this job for you.
The only way to do it simply is to attribute the admin role to this user.
If you’re on a tight budget, we recommend you to require the services from Envato Studio freelancers (https://studio.envato.com/explore/websites-programming). This web platform gives you access to developers who have already experience with theme customizations, and for very competitive prices.
If you’re happy with our theme, feel free to review our theme on our Themeforest page:
https://themeforest.net/item/gwangi-dating-community-theme/21115855
It very appreciated and it helps us making our products more known to new potential customers, which allow us more time to improve the quality over time and develop new features. It’s a win-win !
And by doing this, you will be making a great contribution to our community! #SharingIsCaring ❤️
Thank you!