It is widely believed that Trump was able to get a cease fire in Gaza and the return of the hostages because he put maximum pressure on all leaders in the Middle East, especially Israel and Hamas . He put the pressure on these leaders not because he had some altruistic goal to end the fighting and suffering. He did it because he so badly wants a Nobel Peace Prize. The fact that he didn't win this year may have provided an opening for a new approach to the issue.
President Zelensky should contact the Nobel Peace Prize Committee and tell them they have a chance to not just reward people working for peace after the fact, they can actually encourage peace themselves. Zelensky should talk to the Committee and ask for a commitment to give Trump the peace prize if he gets Putin to agree to and implement the following:
Complete cease fire and removal from all hostile troops from Ukraine.
Return all Ukrainian territory Russia has taken. That includes Crimea and the areas taken before the most recent Russian invasion of Ukraine.
Return all the Ukrainian children that were kidnapped.
Allow Ukraine security measures like joining the European Union and NATO, and allowing U.S. and European troops to train in Ukraine.
Zelensky could then go quietly to Trump and explain if he can get Putin to agree to these four items, the Nobel Committee has committed to give Trump the peace prize. All the parties can agree to keep the agreement secret if that is needed.
Trump's ego will demand that he make whatever effort is needed to accomplish the task. Full sanctions on Russia. Unlimited funds. Cruise missiles and other sophisticated equipment.
Given Trump's declining mental abilities, I think he should be warned that starting a nuclear war with Russia will invalidate the whole agreement.