As per network topology . Vlan 10, Vlan 20, Vlan 30 are used in setup . Hence each Vlan has its own broadcast domain .so need to create each DHCP pools in router for each Vlan .
Router1(config)# ip DHCP pool vlan 10
Router1(config)#network 192.168.10.0 255.255.255.192
Router1(config) default gateway 192.168.101
Router1(config)#dns-server 8.8 .8.8
Router(config)# DHCP -lease X.X
Router(config)# no shutdown
Configure DHCP scope for Vlan 20 & Vlan 30 same as above .
As per diagram ,we cannot use DHCP relay to forward Router1 DHCP traffic to router2 . Beacuse in router2 network Vlan 10 network address used is different compared to Vlan 10 network address in router1