Summary
I was working with a colleague who asked me to test the new preview connector built. Since this is a preview connector I was not able to see it in my demo tenant.
I had to do the following steps.
#1 Go to Data -> Connection under https://make.powerautomate.com
#2 Select New connection
#3 In the URL append ?addConnectorHideKey={name_of_the_preview_connector}
Conclusion
This is a simple post with just a little trick to see the hidden connectors. I saw the article here as well.
Also, you could add ?addConnectorHideKey={name_of_the_preview_connector}&showHiddenConnectors=true.