Hello Akshay Karoo,
Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.
Please review the diagnostic logs, as they can help you understand the situation better. Below link is how to set up the diagnostic logs.
Monitor Azure Virtual WAN | Microsoft Learn
Reset Router
It is responsible for restoring the router to its factory default settings.This process can help resolve issues related to misconfigurations, routing failures, or connectivity problems
Hub Reset
Resetting provides you with a way to bring any failed resources such as route tables, hub router, or the virtual hub resource itself back to its rightful provisioning state.
For additional reference, please visit this link: About virtual hub routing - Azure Virtual WAN | Microsoft Learn
Kindly let us know if the above helps or you need further assistance on this issue.
If the information is helpful, please click on "Upvote" and "Accept Answer" so that it would be helpful to other community members.