Why does the a321 not have light up controls but the a320 does and other planes?
The A321 was reworked and relies on pre-A320 code. The A320 update was the first to have light up controls but the A321 was left out most likely because it would require a complete redo of the code.
Light up controls?
In the cockpit.
Are you talking about this?
Yes I believe OP is
A321 DOES have controls that light up at night! When the A320 Family was reworked the A321 was fully included and is a totally new model from the old one!
You must’ve turned down your graphical settings by accident.