https://click4r.com/posts/g/18....383572/using-a-cat-f
Cat flaps are a great option to allow your pet to move around whenever it wants. You can also opt for a locking cat flap to prevent other cats and animals from gaining access to your home. Installing a cat flap on a bifolding doors is possible provided that the door is made from toughened glass. The frame should not be damaged or rotten. The process is largely the same as installing a cat flap in an wooden or uPVC door. Easy to install Install a cat flap onto your bifold door to allow your pet to enter and exit the h