Google came up with a new captcha that does not need any “manual” authentification by the user anymore but checks it in the background. It then shows an icon at the lower right corner of the browser window.
Have you also noticed that it overlaps with the back up button that can be activated via the Nirvana settings? It’s also located on the lower right corner of the browser window as soon as you scroll down a little. When I checked my website on the mobile phone version within the wordpress customizer, the Google captcha also goes in between the search bar (that shows up by opening the navigation). Meaning, the Google captcha icon goes behind the search bar button and in front of the search bar you can enter your text.
I believe the team that decided to add the badge at the exact location where most sites already had some kind of functionality (back to top button, cookies notification, so on and so forth) should have taken this under consideration.