Thank you for contacting us, Alexa can be used to turn Activity on and off.I sent you the Guide to working with Alexa, hope it helps you.
https://www.sofabaton.com/faq/how-to-use-alexa/
Thanks for contacting us, if your device's original remote power on and power off are separate, you can add a power on command for turning on this device in the activity's startup setting.
Thank you for contacting us. About your device samsung UE65NU7400. our engineers have added to the code library. You can search the device brand and model to add.
Brand: Samsung Model:UE65NU7400
Also about Xbox one s, we have the code of this device in our code library, you can add it.
Brand:Microsoft Model:Xbox one s
Because the signal of X series is sent from hub, the remote control itself has no IR signal, so you need to use IR blaster when there is obstruction between hub and device.
Thank you for contacting us. It is currently not possible to add additional commands to the Bluetooth code base. I will escalate your demand to our team to assess the feasibility and consider if it can be added in a future update. Thank you for your suggestion!
Dear customer, thank you for your patience .Just confirmed with our techs that your device has been added to our database, please use the information below to add it.
Brand:McIntosh Model:MX100
Thank you for contacting us. We suggest you select Other when you add it and then re-pair it. If the home button doesn't work, you can try assigning the homepage button instead, and the ok button can be selected instead of the select button.
Vielen Dank für Ihre Antwort, dieses Gerät unterstützt auch IR, wir haben den Code für dieses Gerät in unserer Code-Bibliothek, empfehlen wir Ihnen, Marke hinzufügen: Sagemcom Modell: DCIW387 UHD. und dann testen, ob es funktioniert.