Azure AZ-700 VNET peering video name "Configure User defined routes"

Hi All,

I am confused how the VNET peering works, even with Forward option selected, I can’t access remotely peered network(Spoke-to-Spoke). Also in this Video you are deploying using “https://github.com/rithinskaria/kodekloud-az700/blob/main/labs/13-udr-nva/deploy.ps1” where I can see full mesh on VNET peering. Which will allow the communication from Spoke-to-Spoke.?

Can VNETs be transitive without use of user defined routes? Like just by enabling Forward option in VNET peering?

Regards,
Justin George