"The TV turns on but the stick doesn’t."
The power button and volume buttons on your Roku remote are TV controls only. They have no effect on the Roku device.
You need to press the Home button on the Roku remote in order to wake up the Roku.
If you want both your Roku and the TV to turn on together, you will need to enable HDMI CEC on your TV and also enable 1-touch play in your Roku settings. Settings/System/Control other Devices/1-touch play (checkmark to enable).
With the above configured, any button press on your Roku remote (other than power and volume buttons) will power on your TV, switch to the Roku HDMI input, and wake up the device so you will be on the Home Screen.
Remember to press Home to stop streaming/data usage, and then press the Power button to turn off the TV when finished streaming.
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102