New Azure accounts using only free credits or operating under a Free Trial are often subject to specific service restrictions, potentially including a zero quota for resources like Azure Front Door. Please refer the document.
These free tier subscriptions are explicitly ineligible for requesting quota increases for any service. Please refer the document.
Upgrading the subscription to a Pay-As-You-Go (PAYG) model is a mandatory prerequisite for requesting any quota increase. See, Azure subscription and service limits, quotas, and constraints.
Even after upgrading to PAYG, full access to services or standard quotas might be delayed until the account establishes a "payment history," which likely requires the first successful monetary transaction rather than just having a bill covered by credits. Please refer the similar thread.
Purchasing an Azure Support plan is a separate transaction for support services and does not constitute a "first payment" for resource consumption, nor does it automatically lift resource quotas or bypass eligibility requirements. Please refer the document.
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