I found this support forum post but the solution provided doesn’t work.
Edit (thanks to @moreeni@lemm.ee for the Stack Exchange link):
Solution - Go to Settings -> Home -> Enable Shortcuts -> Go to a new tab -> Google will be pinned by default, hover over the Google icon -> Click on the 3 dots menu -> Unpin
Ecosia uses a combination of Google and Bing for its search results.
I find that my search results haven’t declined the way everyone else is yelling anou so I imagine they can decide which Google and Bing processes they utilize, to great affect