Finally, Android 10 Q is official and so the AOSP 10 Source code. Lenovo Vibe K5/Plus (A6020) is now getting the unofficial version of Lineage OS 17.1 developed by Josef Recognized Developer. The device is launched on February 2016. The phone came out of the box with Android 5.1 Lollipop. Now you can enjoy Lineage OS 17.1 based on Android 10. Full credits to him and Lineage team. Now you can install Lineage OS 17.1 on Lenovo Vibe K5/Plus which is stable enough to use as a daily driver.
Android 10 is Google’s 10th version of Android OS with plenty of new features and system UI changes. Google doesn’t come with any dessert item name for the new Android version this time and that’s a good move. If you’re new to the Android ecosystem, it’s worth mentioning that Android is an Open Source Project (AOSP) by Google. With the new released Android 10 source code, the Lineage team has started working on Lineage OS 17.1 for all the supported device.
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To install Lineage OS 17.1 on your Lenovo Vibe K5/Plus, you need to unlock bootloader and running latest TWRP Recovery. If you are on the old version, you will see error 7 warning text while installing the custom ROM on Lenovo Vibe K5/Plus device.
Talking about the specifications, Lenovo Vibe K5/K5 Plus features a 5.0-inches display with a screen resolution of 1080 x 1920 pixels. It is powered by Qualcomm MSM8939v2 Snapdragon 616 processor coupled with 2GB of RAM. The phone packs 16GB internal memory. The camera on the Lenovo Vibe K5/K5 Plus comes with 13MP and 5MP front shooting camera. It is backed by a Removable Li-Ion 2750 mAh battery.

Please tell me where I can download this firmware.
Lineage-17.1-20220528-UNOFFICIAL-A6020