Manjaro on Rock 4 SE no WIFI

Good day everybody, I am new to the SBC world and need to lear alot still.
I have got me a Rock 4 SE and I am having problems with OS selection. Installing on SD. I have tried the recommended Debian or Armbian but found them a bit sluggish. You cannot watch an HD (1080p) video on youtube. Period.
I wanted to give Manjaro a go, but the link to the distribution is broken. After some trial and error I manage to install Manjaro-ARM-kde-plasma-rpi4-23.02 and I was ecstatic. But I had no wifi.
Can somebody point me please to some info on how I could fix this?
Thank you and have a great day.