Here’s a pretty typical american pump: https://www.alamy.com/stock-photo-shell-station-gas-pump-135764267.html You can select diesel with the green button, which comes out of the green handled hose on the left, but any other option for regular gas (87/89/93 in that picture) comes out of the right hose.
There’s a recent podcast talking about this if you’re interested - https://omny.fm/shows/better-offline/the-man-that-destroyed-google-search
TLDR; they fired the guy largely responsible for building google search and replaced him with the guy running google ads.