Hello Hamidou Sy,
Welcome to the Microsoft Q&A and thank you for posting your questions here.
I understand that despite your quota being adjusted, the VM size you're trying to use exceeds the approved quota for the StandardDpldsv6Family cores in the West US 2 region. Meaning that the specific VM size you need is not available in the region you're deploying to. To troubleshoot by yourself use the following links: https://learn.microsoft.com/en-us/troubleshoot/azure/virtual-machines/windows/restart-resize-error-troubleshooting and https://learn.microsoft.com/en-us/troubleshoot/azure/virtual-machine-scale-sets/scaling/virtual-machine-scale-sets-quota-exceeded
You can also contact PCS: Priority Customer Support for fast resolution.
I hope this is helpful! Do not hesitate to let me know if you have any other questions or clarifications.
Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful.