I have the same issue with all my google home devices. I have them throughout my home so they cannot all be close to the router. A real solution is needed. Not try this and that. A fix is needed. I have the Google mini and google display and the orig google home. I have smart divices like lights and tbs connected to them throughout the house. I have the eero mesh wifi system and a very strong signal for my entire home.
It looks like we have come to a solution so I'm going to be locking this thread. If you have any other concerns or questions, please feel free to create a new thread.
Have a great day.