Hi friend!
Thank you very much for your advice on using a CISCO MX, I would have liked it possible to do this directly in the cloud, without having an MX or an L3 switch, it seems to me that CISCO is extremely efficient and should allow to use the manual services of DHCP and create specific SCOPES directly in the cloud, but it does not matter, I'll keep dreaming of this, maybe one day CISCO will allow it.
Best regards from Costa Rica!!