That flag arrangement is at the Peace Bridge from Fort Erie into New York. It was flying when I moved to the area in 1998 and was still there when I was last able to cross in 2020. I can’t say if it’s still there because I haven’t been able to cross since June of 2021 and I didn’t look on that day.
I drove near the Peace Bridge today and the UN flag is gone and only the US and Canadian flags are flying. The bridge underwent a repair and resurfacing from 2016-2019 and the flags were removed near the end of that project. I have a friend who said that the UN flag was never put back up after the resurfacing was completed in late 2019. I thought I saw it in 2020 but he thinks not. The covid nonsense started in early 2020 and time has stood still since then, so he’s probably right.