Hi and welcome to the Google Nest Community. It is one of the ways you
can access support, another way is the excellent help center articles
which you can see by going to the link below.
https://support.google.com/chromecast/chromecast#topic=3058948...
From looking and asking about, I don't think it's possible without
either buying another Google remote or you can attempt to use the Google
Home application on your phone, while you are connected to your WiFi
network, to find the device, add it to th...
Hopefully this link below will help with with your query.
https://support.google.com/chromecast/answer/11221499?hl=en#:~:text=From%20the%20Google%20TV%20app&text=At%20the%20top%2C%20tap%20Scanning,your%20phone%20or%20your%20remote.