I don't know if my answer will be of any help. But I'll do it anyway.
The monitor has been in use for about 2 months. It was triggered by the fact that I now work more and more in my home office. I had to pay for the BS out of my own pocket, but that didn't bother me. So far I am completely satisfied with the monitor. You might have to be aware that the monitor has no camera and no boxes.
Now to the actual answer: I connected a Mac mini (latest generation M1) via USB-C cable. I think the cable was included. For business, I have an HP laptop, which I connected via an HDMI cable. I can switch between the devices without any problems (I do this directly on the monitor). I don't know whether the HDMI cable was also included (thanks, but rather yes). I'm not an absolute connoisseur, but I believe that "commercially available" cables are sufficient. Maybe I wouldn't buy the cheapest product.
And by the way, 49" is huge. In retrospect, a "smaller" one (maybe 42") would have been enough for me. But - I work more comfortably with this monitor in my home office than in a shop with two 19" screens (and without a disturbing edge in the middle).