If a person without a gallbladder is experiencing digestive issues or other symptoms of fat maldigestion, then they would want to look into ox bile or lipase supplements.
Since supplements are only as good as they are digested & absorbed, I'd recommend that some sort of supplement like the ones listed above is taken with any & all fatty acid supplements (ie. fish oil, CLO).
I've had patients without gallbladders that couldn't even stand the smell of fats (in cooking) without getting nausea. This same person got headaches if she ate fatty foods. Different people experience different levels of symptoms, however, I believe that basic fat digestion and absorption are negatively affected by removal of the gallbladder.