ArchOversight parent
That's why Matter and Thread are IPv6. You don't need IPv4 at all... and if you run out of IPv6 address space, I'd love to see just how many devices/sensors you have in your home.
Yup, the number of IP address is not a problem.
What might be a problem is the number of devices that can be connected. For example someone who is using an Xfinity Gateway for their WiFi has a limit of 100 devices on each band (2.4 GHz, 5 GHz, 6 GHz) if they are on an XER10, XB10, or XB8. An XB7 can have 75 on each of 2.4 GHz and 5 GHz. An XB6 can have 30 on 2.4 GHz and 75 on 5 GHz.