Maybe it's PNO https://source.android.com/devices/tech/connect/wifi-scan https://source.android.com/devices/tech/connect/wifi-scan > On devices running Androi

Maybe it's PNO https://source.android.com/devices/tech/connect/wifi-scan https://source.android.com/devices/tech/connect/wifi-scan > On devices running Android 9 or lower, when the device is disconnected from Wi-Fi and the screen is off, PNO scans occur at 20 second intervals for the first three scans, then slow down to one scan every 60 seconds for all subsequent scans. PNO scanning stops when a saved network is found or the screen is turned on.