Hei @Vaibhav Shah ,
Thank you for contacting Microsoft Q&A.
I am assuming that you are accessing Azure Win 11 VM via Remote Desktop Connection.
- Remote Desktop Connection follows the resolution of the host machine or the base machine of which RDP was initiated.
Update the resolution of the base machine and then take up the RDP, you should have the resolution you need.
- It may also help to change the scale setting to get the resolution on RDP
Do mark this as answer if it helped