I don't know if I understand very well what you want, are you talking about DHCP?
Meraki is like any other network equipment, in fact even simpler and the logic is the same.
If it's about DHCP you can check these documents.
You can also find topology examples in the documentation.
https://documentation.meraki.com/MX/DHCP/Configuring_DHCP_Relay
https://documentation.meraki.com/MX/DHCP/DHCP_Services
I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.
Please, if this post was useful, leave your kudos and mark it as solved.