Your DNS records are correctly configured and domain ownership is verified, but the certificate issuance pipeline stalled before completing. We've started a certificate re-issue for your domain, which should complete within a few minutes.

I still have the same issue.

Your DNS records and domain verification are still correct, but the certificate remains stuck in the validation step despite the earlier re-issue. We've started another certificate re-issue for your domain, which should complete within a few minutes.

Do I need to wait more days? It has still been validating for 4 days now.

No, you should not need to wait days. We found an A record pointing to a non-Railway IP address on your root domain alongside the CNAME. Railway does not support A records for custom domains, and this is likely preventing the certificate from completing validation. Please remove the A record for your root domain in Namecheap so that only the CNAME pointing to Railway remains. We've triggered another certificate re-issue, which should complete once the A record is removed.

only these records are available in Namecheap side

We can still see an A record resolving for your root domain alongside the CNAME. Looking at your screenshot, the "URL Redirect Record" at @ is the only record that could be producing it. Please remove that URL Redirect Record in Namecheap, then verify the A record is gone (you can check at a site like dnschecker.org). Once only the CNAME remains, the certificate validation should complete.