View the original community article here
Last tested: Apr 27, 2021
Pull requests are only an option for supported providers. If you've chosen "Custom Git Provider" from the dropdown when configuring your git connection, you won't get the option for pull requests.
Also, if the repository is hosted by Looker, pull requests are disabled. You will need to host your own repositories if you want to use them.
This content is subject to limited support.