In this particular case it doesn't show the "action"...
When I use Firefox, everything shows up right.
My Mac uses Ventura 13.3.1 / Safari Version 16.4 (18615.1.26.11.23) (with content blocker disabled) (all new), and Node-RED is Version 3.0.2 with Node.js Version 19.9.0 on top of a dietpi system.
No, Edge uses Chromium which uses the same engine as Chrome and various other browsers. Though browsers on iOS have to use webkit. Chromium uses Blink which was a fork of webkit but is generally more current with web standards.
Edge has some excellent features, especially if you use other Microsoft cloud services. And it has the major advantage of not sending all your data to Google (though it does send some data to Microsoft of course - but Microsoft's main revenue does not come from advertising like Googles does).