Add a keying set that includes location, rotation, scale, and custom properties. The keying set is intentionally not based on the "Whole Character" keying set. Instead, it is generic enough to be used in both object and pose animation, making it possible to quickly switch between animating characters and props without switching keying sets. This is, according to @rikkert, what the Blender Studio animators need 99.9% of the time.