Question about the functionality "Enforced Training" in the menu tab "Agents": Is there no security question about whether the RA agent wants to complete the e-learning?

No, after clicking the button, the process starts immediately. It is also not about whether the RA agent  “wants” to complete the e-learning. It is instead a question of whether you, as the responsible Master RA agent, believe that further training would do the RA agent good, as you have identified knowledge gaps.