Engine sounds like old transit van after timing belt change --- 2020 Octavia 2.0 TDI ( DSTA / EA288 EVO )

I bought a 2020 Octavia with 2.0 TDI ( DSTA / EA288 EVO ) and DSG DQ381. I drove around for couple of weeks and everything was good, engine didn't make weird noises etc. I was actually surprised how smooth mild and quiet engine sounded for a diesel. I then went to Škoda dealer and got the timing belt, water pump replaced as kilometrage was just over 120 000km and 6 years had passed. At first I did not notice anything but slowly I started hearing more and more different noises coming from the engine. I don't know if I was deaf before? Anyway I hear very faint high pitch ticking when I press accelerator and some other weird noises I can't describe.

But what bothers me the most is that old Transit van rattle that was not there before. This not only happens when engine is cold but can even happen when engine is fully warmed up after 30 minutes of driving. Other times it's decently quiet and not noticeable at all for some reason? And in some cases this rattle is EXTRA loud. Can happen while accelerating or even driving at steady rpm.

Also there is odd clunk that sounds like knock when I am stationary and tap the accelerator quickly. Video below. Possible DMF related?

Tell me if I am just crazy and it always was there or whether there is actually something wrong.

Anyway couple of videos.

Transit van like rattle at mild acceleration. 5-10 minutes after cold start. In some cases sounds 3x as loud. Phones microphone is not very good at picking up the sound.

Clunk / knock: