The Procreate software lacks the standard “bucket fill” capability. To color fill in Procreate, just touch and drag the color disc in the upper right corner of your screen onto your topic. The topic will be colored in the selected hue as soon as the button is pressed.
How do I fill a layer with color in Procreate?
If you wish to change the color of a layer in Procreate, you must first choose the layer you want to modify. Drag your color onto your canvas and then let go of the mouse button to fill your layer with color. Use the Color Fill option in the Selection Tool or the Alpha Lock function to color components within your layer.