@Akshay Kiran Thanks for posting in our Q&A.
Based on my research, I find that we can try to get PFN via the command "Get-AppxPackage". Here is the article:
https://learn.microsoft.com/en-us/mem/configmgr/protect/deploy-use/find-a-pfn-for-per-app-vpn
If still unable to find the PFN, there is no helpful information I can share with you from intune's point of view. So, it is suggested to post in Microsoft 365 and office community forum to get more help.
Thanks for your understanding.
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.