@Lamichhane1
Hi
All Deco models (including different hardware versions) can work together to form a seamless roaming mesh network without issues, all Deco models are compatible with one another.
However, a few advanced features might disappear from the Deco APP or become different after mixing different models, here are some examples for your reference.
These features are available as long as the main Deco has it:
VPN Server/Client, Static Routing, Changing WAN MTU, HomeShield (Parental Control) etc.
These features are available only when all Deco units in the network have it:
IoT network, WPA3 encrption, Reboot Schedule, Connection Preferences for client devices.
These features are independent ones, not related to other Deco units:
Signal Source selection for satellite units.