Thanks for reaching out and sorry for the late response. Let's sort this out.
A few questions — is this a first time setup? How far is the Google Home Mini from the router? Also, since you are using an iPhone to set it up, make sure to turn off mobile data and turn on bluetooth. You can check the how to set up here: https://bit.ly/3aMFr6o
Keep me posted.
I wanted to check in and ensure everything is working properly. Please let me know if you are still having trouble, as I will be locking the thread in 24 hours due to inactivity.