Google Cloud DNS records do not propagate to any server

Hej!

I own a domain registered through GCP and it's connected with Cloud DNS in GCP, I would be very happy if you could help me setup my custom domain for my web page at buahaha.github.io.

I think I know how to do this, because I did it before with other domain(s), but this time something is not working as it should. I have set up even a TXT record, and it does not propagate through DNS servers, and the same goes for my CNAME record. I attach screenshots of my setup below.

It's strange to me as it is the basic setup for this kind of service, and I'm really confused...

Pozdrawiam,
Szymon 🎶

In addition to @blacha answer, here are some links and guidance. Once you use Cloud Domain to register a domain, there is an option where you can use which DNS provider that you use for your domain. These are Cloud DNS, Google Domains and Custom Name servers.

If by chance you get confused which DNS server that you are using I suggest to DIG your domain to see which name server that you are using just to make sure you are using the correct DNS server.

Since this concern choses Cloud DNS here is the link that you can follow on how to create zone, configure A record connecting to the domains IP address and creating Cname record for the subdomain that you desire.