@Parmeshwar Jadhao , if you are trying to route internet traffic through Azure VPN then I would say it might not be possible at this time. Because, to add internet as a next hop to your network you need to associate 0.0.0.0/0 route to the gateway subnet which is again a feature not supported on gateway subnet for that route.
I recommend you to upvote it and other features that are of interest here in this feedback section. In general, Azure feature team would check feasibility of a feature request, triage it, prioritize against existing feature backlog, add in roadmap as appropriate and would announce and/or update the related Azure document once a feature request is addressed.
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