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I'm on Big Sur and have it on my Safari?

It was a separate button on the toolbar, not right next to the address bar (which if you misclick you end up editing the URL instead of reloading).

And it was Safari 4, released in 2008!

Command R. I use a browser that has a refresh button and I don’t bother using it ever.

This is my habit as well. Rarely click refresh button.