Hello G S ,
Welcome to the MS Q&A platform.
It seems like you have exceeded the limit of Vcores for the region.
Please check the current usage of the Standard F family vCPUs from the Azure portal.
On your subscription, go to usage+quotes and look for "Standard FS family
To request a quota increase, go to the portal and file a support issue. In the support issue, request an increase in your quota for the region.
A similar thread has been discussed here.
I hope this helps. Please let me know if you have any further questions.