xert mobile andriod sensor connection problems

mobile app is running on a pixel2, the cadence is garmin, headunit and HR are garmin, power meter is power2max. No ant+ sensors show up on scan only nul BLE. Am I missing something?

Be sure you have all the ANT+ plugins and services installed and have a USB OTG dongle with an ANT+ stick attached.

the usb dongle has to attach to the phone?

Yes together with the ANT+ stick.