In reply to John Ww:
I've also mangled my ankles loads of times over the years (rugby, ground falls, fell running injuries, inexplicable sprains on easy ground, etc.)
Surprisingly, what I find works best is footwear that has very little ankle support - fell and trail running shoes. This is because the low stack height at the heel provides exceptional stability. The higher your heel is above the ground, the more likely you are to go over on it. The lighter weight and compact footprint also make it much easier to accurately place tired feet and the grip is generally far superior to anything offered by a walking or mountaineering boot.
I mostly wear various models of Inov8 shoes, which tend to have lower stack heights and avoid brands like Hoka which are the opposite. Inov8 Roclites are a good all-rounder, which I've worn when running, walking and scrambling all over Scotland in Summer and Winter (with or without micro crampons.) Obviously if climbing or conditions demand then I'll wear a proper mountaineering boot and crampons.
I don't mind wet feet, but also use a pair of goretex Inov8 Roclite boots if I do decide I want to keep my feet dry, with varying success. The boots are for the waterproofness of the high cuff rather than ankle support.
May not be ideal for yourself, but certainly works for my old knackered ankles and thought it worth suggesting as an option. Hope you find something that works 👍