The air suspension sensors can be recalibrated but I shouldn't think you'd need to do that with the work you've had done.
https://www.audizine.com/forum/showthread.php/966127-C7-S6-Level-Sensor-Calibration
I'm based in Leicestershire but my A6 has been off the road for 2 years as it needs a replacement engine.
There's simply Audi in the new forest. There's a German car show coming up at the British motor museum at gaydon.