Oil can leak from several places. The most common are: obviously oil pan gasket
crankshaft seal (front seal)
rear main seal
valve cover gasket
Not seeing the vehicle, we could not really offer you any suggestion.
What I can offer though is this. If you have two consecutive days that you can keep the car from being driven, you can do this test. You will need a few cans of brake cleaner (spray kind), a roll of paper towel and a whole bunch of cardboard.
Start with a cool car. Hasn't been driven. Place the cardboard under the engine bay. Run the car idle for a few minutes just to have the engine lukewarm to touch. Liberally spray your entire engine with brake cleaner. Wipe all the grease from the engine with the paper towels, on the top and under the car. Once the car is " clean", leave it alone until the next day. The next, look everywhere in the engine to see new of fresh oil coming out of the engine. Then you know that is where the leak is coming from.