I do a lot of fingerjoints with dogbones. If you don’t know they are there you can barely see it. If you want to program them manually you can nearly completely hide them. You can find a lot of examples in my French Cleat thread (French Cleat by Toko).
@thomas_ga made an oak box that is really splendid (Oak Jewellery Box) and he modified his table so that he can work with horizontal boards. It’s something I would love to do but haven’t hat the time. There is also a great video on what is possible with a CNC.