i can confirm no flaps sound in the -900, -900 ULR and -1000 variant of the A350 after the latest update in v1.1.2 (have made a similar thread in discord for a fix) wonder what is going on , could it be possibly a flaps sound rework (new incoming soundset since it got removed?)
link: https://discord.com/channels/535246634448191499/1396719299321659412
On the flaps sound issue , flaps extension on air sounds different from when extending on ground in real life... (seems like it, wonder why different A350s have different flap sounds) the sound sounds deeper
reference (flaps 1+f on ground sound):
When flaps 1 is extended on-air for landing , it sounds different than when extending flaps 1 for take-off on the ground , here is the reference.
link: