Here is an image with fully working wifi and correct kernel drivers for line out audio.
The ROC-RK3399-PC LE image doesn't have wifi or working line out on the ROC-RK3399-PC-PLUS(Station P1)
https://mega.nz/file/hiwDmCTb#…7OuvHBlLoyPWUlM
Flash with Etcher
If you find it useful please comment that hopefully LE team can add the wifi driver to LE in future.