Hi René, 🙂
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 do this job for you.
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.