Questions about Dell S2722DC

You cannot connect the Mac Pro M1 directly to the monitor via USB-C, as the monitor does not support USB-C video output via the USB-C port, which is suitable for video transmission. Instead, the monitor has HDMI ports that you can use. The resolution of the monitor is 2560 x 1440 pixels, which is sufficient for most applications. However, if you need a higher resolution, this might not be enough.

Yes, the Dell S2722DC monitor comes with HDMI connections, but it is not explicitly stated whether an HDMI cable is included. You should check the official product description or the manufacturer's package contents list to make sure if an HDMI cable is included.

For MAC you should use 4K monitor, otherwise the text is not going to be sharp.

Yes, all USB connections can be used together. However, I wouldn't choose a 2560 x 1440 pixel resolution for a 27-inch screen, because there are already 4K UHD 3840 x 2160 pixel screens available from 350 francs. In Windows 10 or MacOS, you can adjust the scaling and small fonts will appear larger. The huge advantage of 3840 x 2160 is that even if you set this picture to 150% scaling and use it as a 2560 x 1440 pixel display, the fonts are now all razor-sharp, even small fonts, because there are more pixels available. A 4KUHD Montor from 350 francs that also has USB-C would be this model, for example: LG 27UK670-B (3840 x 2160 Pixels, 27 ") There are even some from 350 with 32 inches, where you could even use the full 3840 x 2160 pixel resolution without scaling: Samsung LS32AM700URXEN (3840 x 2160 Pixels, 32 ")

The monitor was basically designed for Windows devices. You can also check the reviews at https://www.dell.com/en-us/shop/dell-27-usb-c-monitor-s2722dc/apd/210-bbqs/monitors-monitor-accessories. According to some feedback, the notebook also seems to work with certain Mac devices, but compatibility cannot be generally guaranteed.