... With both the dryer and with AEG support (nonexistent)
Bought the dryer in Feb 2021. Specifically wanted a vented machine, preferably from a quality manufacturer. From day two, it started making an annoying squeak when rotating in the main direction (squeak stops during the brief periods when the drum rotates in the opposite direction) - loud enough to be heard in other rooms.
The AEG support page about "Unusual noises" says that "If the machine is new, the sound will probably disappear after a while".
After a week, I queried how long "after a while" might be via the AEG customer support page - no response from AEG, even after following up a few weeks later. Four months on, the squeak has become intermittent, both within a drying cycle and from day to day use - sometimes it disappears, only to return later as bad as ever.
On a positive note, the dryer does actually get the wash dry fairly consistently, occasionally toes/heels of thick socks have hint of dampness, as can thick waistbands. It's a pity there is no 15 minute drying option (instead of 30 mins which is the shortest) to deal with this. Also a count-down to completion timer would be helpful, as would an interior light.