So here is my experience with 1.4tsi 03C906032AJ flaps deletion

The car comes to friendly repair shop with deleted flaps and 'professional german tuner' flash. Customer states that engine starts like sht and also had misfires at idle until 80c

I do not had experience with properly flaps deletion, checked readout flash - 'professional tuner' only changes fehlerklasses as usual..
Unfortunetaly i was limited in time so i cannot change maps one by one to find a solution. Also its only VCDS diag available

FHOKH & TNSTUSVB & KFLBKH* gives a good start but misfires was still there. Theyre dissapeared only when LR comes into game but weird thing is fr_w is not deviate so much right after activate, just a few % + rl_w was pretty high (25%) so in that moment i leave idea about lean condition.
Im also had no idea what the reason of misfires due to lack of knowledge / diagnosis tools etc.

Next step was KFWBHO* but still no effect

Then i was curious about load path and find out that sensor lbkist_w still shows about 40% with connected wiring and 99% with disconnected. im tracing a bit FR and comes to KL1 (klappe 1) which configured in this file as LBK so i changed KFFPBRKL1 as it takes effect when klappe1 active and this also give me nothing. I believe its lbksol_w related but why not to try?

To be sure about its not lbkist_w related, i have changed LBKGRAD*, ULBKOFS, FLBE and so on.. now lbkist_w was 0% in any condition but still nothing

Finally i had to change KFLANS to 0.8 in any temperatures up to 2000 rpm and misfires almost gone

Maybe someone find it useful or just for lulz about blindly tuning duno

There's nothing to figure out. The engine needs the flaps to start well.
The alternative is to dump a ton of fuel, which he did.

This is on turbo. On NA the flaps are responsible for manifold length tuning and midrange torque takes a nosedive with them removed (should never be done).