@Kyoya-2369 Can you try to increase the disk size using the Azure PowerShell:https://learn.microsoft.com/en-us/azure/virtual-machines/windows/expand-os-disk
Let me know if you are still facing any issue.
Hope this helps!
Kindly let us know if the above helps or you need further assistance on this issue.
Please don’t forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.