There's a chance the issue is in your trust policy. Here's a diff of yours compared to a working configuration. In the working config, the repo name is aws and the github username is mbuotidem. It appears you are missing the account number as well as setting the org and repo incorrectly.

If this doesn't work, please share screenshots of your trust policy and github oidc provider settings with your account number redacted and we can try to troubleshoot.

If