Questions about Samsung T9

My new Samsung T9 4000 GB loses connection to my equally new and very powerful HP Elite notebook over and over - is that a known issue? I expected much better from such an expensive storage device

Is USB 3.2 gen 2x2 supported on a Macbook Pro M3? M1/M2 do not support the standard and Apple only states USB 4. According to Wikipedia, the implementation of 2x2 is voluntary. I want to replace my defective Sandisk SDD. If the standard is not supported, I might as well buy a T7 or another older SSD.

What could be the reason that this external drive saves very slowly (200 MB/sec.)? I need it with Windows.