How can we improve WHMCS?

Good Evening. If it is possible, since we use hosting packages, which means that the customer can also have a technical support package, it would be good if we could create a product in which we can register all the history of the upgrades - changes we have made. That is, the customer can enter his panel and if he has purchased a technical support package, he can see in detail what work we have done. In this way, the other platform administrators will be able to see what work we have done so that they too know what they need to do.