Google project not visible in google home on other users phone

I followed the manual setup for the google assistant integration. The project shows in my phone at the google home app and I can connect it.
I can control the home assistant devices by voice through the speaker.

I also followed the steps in Google Assistant - Home Assistant to allow my wife for the same project. However the project is not showing in her “works with google list” on her phone.

Anybody any advice?