OK I ordered the low reach adapter for the Gen5detect . On the website it states that the adapter works with this model.
Low-reach adaptor
Bends to comfortably reach down low. Engineered to clean further under low furniture by adjusting the wand angle up to 90°.
Engineered to fit Dyson Gen5detect, Gen5outsize, V15, V11, V10, V8, and V7 vacuums.
I ordered it twice thinking I screwed up. The box does not list the Gen5detect. Called support and they were as confused as I was. Told me this is the first they have heard of this.. Really!
So I looked at the part and grabbed a wirecuter and removed the Key/Plastic piece that is on the wrong side of the gray part and blocking it from attaching. Works great now.
Very strange I can not be the only one looking for this part.