Anthropic FTU form blocked despite verified IAM, Marketplace, Billing, and Bedrock service status "Your account is not authorized to perform this action"

Hello,

ISSUE: FTU form submission for Anthropic models returns "Your account is not authorized to perform this action. Please create a support case (https://console.aws.amazon.com/support/home) with details about your use case and we will get back to you." despite all prerequisites being verified.

COMPLETE DIAGNOSTICS VERIFIED:

• IAM: bedrock:PutUseCaseForModelAccess present (AmazonBedrockFullAccess)
• Marketplace: Subscribe, ViewSubscriptions, Unsubscribe permissions attached
• Payment: Valid Visa card on file (expires 05/2031), set as default
• Billing: No past due charges, account in good standing
• SCP Policies: No AWS Organization, no SCPs blocking
• Personal Health Dashboard: 0 open issues
• Service Health: Bedrock operational in us-east-1
• Tested from: Owner account AND IAM user - SAME ERROR

ERROR REPRODUCED:

• Console: FTU form → "Your account is not authorized"
• CLI: aws bedrock invoke-model → ValidationException - Operation not allowed

I tried reaching to support. I have business support+ but havent heard from them. Its been 2days. Any advice would be greatly appreciated.

Thanks!