Hello @GS
In addition to chrischin response, I just want to add few more points.
Advertising multiple custom routes on Azure P2S VPN is currently available via Azure PowerShell. The Azure portal interface is designed for simplicity and may not support advanced configurations like adding multiple routes at once.
PowerShell, on the other hand, provides more flexibility and is ideal for bulk operations or complex setups.
If you wish you may upvote the feedback in the below forum requesting this feature. All the feedback you share in these forums will be monitored and reviewed by the Microsoft engineering teams responsible for building Azure.
Feedback Forum: https://feedback.azure.com/d365community
I hope this has been helpful!
Your feedback is important so please take a moment to accept answers. If you still have questions, please let us know what is needed in the comments so the question can be answered. Thank you for helping to improve Microsoft Q&A!
Please accept an answer if correct. Original posters help the community find answers faster by identifying the correct answer. Here is how.