I don't think I have either Realty.com or Realtor.com in my history and I was able to reproduce. In the video, it looks like he tries it on a few devices at the Apple Store, which likely have little history.

I didn't have either... if i typed "realty.com", safari tried to autocomplete with a second 'm' in com (realty.comm), and then took me to realtor.com when i hit "go" (even though the 'first suggestion' said 'realty.com'

If I hit space after 'realty.com', it would try a google search... but if i hit space and then delete the space, it would send me to realty.com

Super confusing... this is on iOS 13.3.1

Still wrong behavior. There's no way a standalone domain name should go elsewhere.

Did you watch the video? He tried it on a bunch of demo phones in an Apple Store and they all did the redirect.

I have never been to either site and was able to reproduce what the post says.