[SOLVED] Pi Zero W - Access Point not working

[Sehnsucht]

Your moOde player should drop into AP mode if it can't connect to ethernet or any pre-configured wireless network (I believe).
Post your sensible looking config

There is practically no config to speak of!  (Unless there's something vital hidden away on a different page).

Router mode: Off 
Network (SSID):  Moode
Channel: 6
Password:  irrelevant - I can't see the network

I have to be careful when playing around because this pi is encased in lego and it's a faff to get to; also, it's using a 200gb sd card; copying all the music over on the Pi's famous crap wifi takes forever (and the Zero W doesn't have ethernet).  So testing any changes requires me to literally leave the house and wander around outside (well, that or displease my family by turning off the wifi!).

Maybe the Access Point is fine and my phone just can't see it.  It's a Pixel 6a.  I *think* I also tried to find it on my Amazon Fire Max 11 tablet.