Why insta360 no longer sell dive case for one X2 ?

My father bought me one x2 because he thought it will be helpful for my diving.

But he didn't know that insta360 no longer sells dive case for this model, and there is only venture case which cannot properly stitch the video taken underwater.

Of course I know that one X2 is waterproof till 10m, but I usually go deeper than that. So the X2 my father bought me is actually useless for me at this moment. (I tried venture case, but the stitching was terrible)

I'm just wondering why insta 360 no longer sells dive case for older model, even though they are still producing the model itself.