Homekit geofencing not working or not adapted to apple products !

I have a lot of problems with geofencing... some might be iOS limitations, others, just really poor implementation. OK, I see I can't change the radius. This is silly and the way around this is to select an address with a custom radius that will not overlap with home. (!)

Here is my setup:

Several lights, switches, and dimmers (Philips Hue, Lutron Caseta) that work well.

Able to config time-based automations

Scenes work well too.

In FindMy, my location is set based on my iPhone and Apple Watch.

HomeKit set to use my location.

What doesn't work:

Simple geofencing...

Automations configured as

(1) anyone arriving home at night: turn on the driveway light

(2) first person arriving at night: turn on several lights (also tried with an "arrival scene")

Those automations are never trigger.

The automation lists me / my iPhone as providing the location.

Before the latest update, the automation listed both the watch and iPhone under my name, now only my phone. Either way, no changes as it just does work - the automation is never triggered as if homekit never understand I'm away or arriving.

Further more, if I leave with only my Apple Watch and the phone stays at home, is homekit designed to figure out I left without my phone? (maybe this should be the subject of another post).

Has anyone experienced such lack of automation triggering with homekit? If so, have you fixed it?

Thanks.