How to Integrate a homemade Smart Speaker?

[PKW57]

Greetings,

I used an old cell phone (Moto X4 running AndroidOne) and a BT speaker to create my own smart speaker. It works but I am having trouble getting it integrated with my Google Home.

• The phone is logged into my Google account.
• It doesn't show up in my Google Home, and I can't figure out how to add it.
• It responds to my voice commands and can control other devices such as the thermostat and various lights.
• It does not respond to the voices of any other members of my household.

The fact that it controls my Google Home devices even though it's not part of my Google Home has me baffled.

Any suggestions on what I'm doing wrong?

Thanks in advance for any assistance,

~ Phil​