@DirtyDobb 

Thanks for reaching out. I understand that you currently have two Deco BE1000 (BE63) WiFi 7 units set up in your home and are considering adding a Deco BE25 Dual-Band BE5000 WiFi 7 to improve connectivity in the space above your garage, where your printer, Fire Stick, and Alexa device often have trouble staying connected. You also want to make sure that features like Allow List Mode and parental controls will continue to work seamlessly across all units.

Compatibility: All Deco models, including different hardware versions and WiFi generations, are compatible and can work together to create a unified mesh network. You can integrate the Deco BE25 with your existing BE1000 units without any issues. We recommend using your most powerful Deco (in this case, the BE1000) as the main unit connected to your modem/router.

Features: Security features such as Allow List Mode and parental controls will remain available and function across your entire Deco mesh network, regardless of the model mix.

Troubleshooting: If you experience any issues after adding the BE25, please contact TP-Link support and provide:
1) The models, hardware versions, and firmware versions of all your Deco units.
2) A screenshot of the network map from the Deco app.
3) A detailed description of the issue encountered.

This way, we can help diagnose any connectivity or feature-related problems you might encounter.

Let us know if you need further assistance!