Raspberry Pi Zero W: access point never appears. Captive portal fails.
### Raspberry Pi Model

Raspberry Pi Zero W

### Describe The Bug

I have followed [all these steps](https://github.com/homebridge/homebridge-raspbian-image/wiki/Getting-Started#step-1-download-and-flash-to-sd-card) to install the Homebridge image on a new SD card.

I booted Pi Zero W (and attached a monitor) and these are some things I noticed:

* First it seems to prompt for a new user (blue config screen) including password, and I needed to set a keyboard layout. 
* Once I did all that it continued booting and finally it presented me with the "continue to setup using web interface" message.
* However no captive portal named "Homebridge WiFi Setup" appears ever, making it impossible for me to complete the setup.

I also tried to pre-configure the WLAN settings in Pi Imager. All to no avail: no captive portal, and no automatic connection to the pre-configured WLAN either. I also tried various power supplies, to ensure enough power was provided to the Pi Zero.

Any ideas?



### Logs

_No response_