if I bring my ear really close to the bottom part of the monitor (where the grill is) I can hear a very subtle noise. 10 cm away and I can't hear it anymore. This is definitely not a thing which disturbs me. My brightness is usually between 20-30% though.

I get 144hz and my MBP loads without any problems. However, I can't get 1 Gbit/s with the LAN cable (via monitor). That's why I use WLan to get the full bandwidth.

Yes, the notebook can be charged via the USB-C port of the monitor without having to be additionally connected to the power supply. The USB-C port of the LG 38WR85QC-W supports up to 90W Power Delivery, which is usually enough to charge most notebooks.

Thank you very much for letting us know. We will be happy to pass this on internally to the relevant department and hope that this will be checked promptly.

The stand itself is 42cm high.

Yes, you can connect the LG Monitor 38WR85QC-W to your iMac 27-inch from 2019, provided you have the right cables and connections. Here are the important points: 1. connections: Your 2019 iMac 27-inch has Thunderbolt 3 ports in USB-C form, which is sufficient for connecting to the LG monitor. 2. connection: You need to connect the monitor to your iMac with a suitable cable. Since the LG monitor probably has USB-C or DisplayPort, you can use an appropriate cable. 3. system requirements: Make sure your Mac is running macOS Mojave 10.14.6 or a newer version to ensure a smooth connection. However, it is important to note that the LG Monitor 38WR85QC-W has a resolution of 3840 x 1600 pixels, which differs from the native 5K resolution of your iMac. However, the connection should work without any problems as long as the connections and the operating system are compatible.