Yes, MR devices can be put into NAT mode, which will put connecting devices on a private 10.0.0.0/8 network and serve IP addresses via DHCP. The features of this DHCP server are very limited however, and currently admins cannot make changes to the functionality of this server.
To read more about NAT mode and the accompanying DHCP server, please consult the following article: Cisco Meraki DHCP in NAT Mode