Ok, weird that you don’t have clouds since your Live Weather is ON. I confirm it works on my side, I have clouds:
Can you try the following:
1- set Live Weather to OFF, save and restart the sim
2- set Live Weather back to ON, save and restart the sim
3- check the world map if clouds are now showing up
If it still does not work, try that: Clouds not appearing in sim and wether not matching metar - #3 by LongHaulSky