Preface: I suspect the answer is "no", but I reckon I'd shoot my shot.
MacOS has an auto-discovery called Instant Hotspot feature for shows nearby iPhones that are available to provide a hotspot. These are listed in the WiFi menu along with their battery level and cell signal strength.
Crucially, this appears before a hotspot has actually been started. Clicking on the menu entry will remotely enable the hotspot on that iPhone.
Has anybody managed to make an Android app that let's an Android play ball with this feature?
If this feature relies on iCloud accounts (I don't think it does, I can see strangers' hotspots) or some central registration server, then this will obviously not work. On the other hand, if it's just using some local WiFi frames, then it seems plausible to reverse engineer and spoof. Is there any existing work on this?