To enable Remote Control on the Kasa App for the RE270K/RE370K, follow these steps:
Make sure your RE270K/RE370K is connected to your home Wi-Fi network and that you have the Kasa App installed on your mobile device.
Open the Kasa App and log in to your TP-Link account.
Tap on the device you want to enable Remote Control for.
Tap on the "Settings" icon in the top right corner of the screen.
Under "Remote Control," toggle the switch to the right to enable it.
You may be prompted to enter your TP-Link account password to verify your identity.
Once Remote Control is enabled, you should be able to control your RE270K/RE370K from anywhere using the Kasa App, as long as your mobile device has an internet connection.
Note that Remote Control may not be available in all regions or for all TP-Link devices. If you don't see the option to enable Remote Control in the Kasa App, it may not be supported for your device.