To me it seems more nuanced.

First, a VPN won’t solve much because this garbage will still be able to log connection periods (when you are home), signal strengths changing over time, (where are you in your home), and traffic bursts (when are you doing something on your phone or other devices).

Second, this is not about mesh WiFi, as I understand. Install OpenWRT, and the mesh function of that won’t do any of this.
The problem is with new (but probably preexisting too) router brands who’s sole purpose is making all the unknowing customers into a product, but stealing their private life and giving it away for money (or anything else).
The problem is basically that a facebook-like company has got deep insight into your network, which you can’t avoid using, especially if your ISP forced you to use these garbage.