This isn't anything new in iOS 26 either. Here's video where the tab bar disappears when there's only one tab remaining...just like it does in iOS 26.I’m so mad that they practically made a big range of things need one additional step than was previously needed. If I have a single open tab in Safari for example, I could previously close it by press "x" and return to my Safari home screen with all my bookmarks and so on. That was possible because the tab bar would be displayed even with just one tab open. That is no longer the case. Meaning I now have to click the two squares in the top right corner to get to the tab overview, and then I can close my tab. So one extra step.
This OS is so inefficient, it’s incredible. It’s plenty of small irrationalities like this one.
Btw, you can tap in the address bar to see your Safari home screen with all the bookmarks, iCloud Tabs, and suggestions without having to start a new blank tab.