I try to use QN9080-DK board, but it didn't appear into the "board and/or device selection page into IDE "New Project" section.
QN9080 support is available to download in SDK format. Visit Welcome | MCUXpresso SDK Builder. You'll need to create a login if you don't already have one.
Thanks and regards,
As LPCX presso support said, you should download the SDK files from SDK Builder page (follow the link provided).
After that, you may find this tutorial interesting: MCUXpresso IDE - Importing SDK Example Project|NXP
To install the SDK, you can simply drag and drop its .zip file into the "Installed SDKs" view tab.
Hope this answer is useful.
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