Most browsing is done on mobile these days, and one of the advantages of using the same browser on your phone and PC is that you can enter your passwords on your desktop with a full keyboard and then have them auto-filled on your phone.
With the move to the new Chromium-based Edge, Microsoft broke the link between Edge on the phone and PC, but a new update to the Edge browser on Android has added in a new option that fixes this.
With Microsoft now using Chromium as the rendering engine for Edge there is a (small) possibility it will be a lot more popular than the current 4%-strong Edge desktop browser. The support for such features makes success much more likely.
Thanks, Thomas for the tip and screenshots.