I used nRF52 SDK V15 and tried to load the sample BLE HID apps into the nRF52-DK Development Board.
I tested both ble_app_hids_keyboard and ble_app_hids_mouse. Both apps worked and paired with the iPhone, but not on the Android phone Galaxy A10e running Android V9 and Kernel V4.4. The nRF52 device doesn't even show up when I go to 'Settings', 'Bluetooth' on the Android phone, but it showed up in other apps such as BLE Explorer.
I would appreciate any suggestion to resolve this issue.