The motherboard supports integrated graphics, only if the CPU has integrated graphics.
The motherboard is mostly just a pass-through. The CPU serves up the graphics to the motherboard, and the motherboard provides the actual outside connection to the monitor.
You can use a dedicated card if need be. Generally, that turns off the integrated graphics functions.
For instance...for an office PC, the integrated graphics on a recent Intel chip is perfectly fine. For running recent games? Not so much.