If you want to check for the update manually you can do this by following the instruction: Go to Settings > System > Software update > Check for Updates.
Huawei Mate 20 Lite Specs: Huawei Mate 20 Lite smartphone was launched in August 2018. The phone comes with a 6.30-inch touchscreen display with a resolution of 1080×2340 pixels at a pixel density of 409 pixels per inch (ppi) and an aspect ratio of 19.5:9.
Huawei Mate 20 Lite is powered by a 2.2GHz octa-core HiSilicon Kirin 710 processor. It comes with 4GB of RAM.
The Huawei Mate 20 Lite runs Android 8.1 and is powered by a 3,750mAh battery.
As far as the cameras are concerned, the Huawei Mate 20 Lite on the rear packs a 20-megapixel primary camera with an f/1.8 aperture and a second 2-megapixel camera with an f/1.8 aperture. The rear camera setup has phase detection autofocus. On the front, the Huawei Mate 20 Lite packs a 24-megapixel primary camera with an f/2.0 aperture and a second 2-megapixel camera with an f/2.0 aperture.
Huawei Mate 20 Lite based on Android 8.1 and packs 64GB of inbuilt storage that can be expanded via microSD card (up to 512GB). The Huawei Mate 20 Lite is a dual-SIM (GSM and GSM) smartphone.
Connectivity options on the Huawei Mate 20 Lite include Wi-Fi 802.11 a/b/g/n/ac, GPS, Bluetooth v4.20, NFC, USB Type-C, 3G, and 4G. Sensors on the phone include accelerometer, ambient light sensor, compass/ magnetometer, gyroscope, proximity sensor, and fingerprint sensor.