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Could have been a typo.

Not the OP but you can do it with a split keyboard

Not OP, but I type while lying down in bed. I don't have the AVP, but I do have xreal Air AR glasses that basically mirror my macbook pro's screen. I rest my Apple keyboard across my crotch/upper thighs, wherever my arms are most comfortable. To my right (on the bed) is my Apple Trackpad. It's kind of a hastle to move my hand from keyboard to trackpad, but I can drive almost all functions on my computer through the keyboard, so it's only used as a last resort. I also have airpods in my ears because the laptop is closed and on the floor.

I do this when my sciatica pain is preventing me from sitting and I'm tired of standing at my desk. I can work lying down for up to a couple of hours and find the position to be highly comfortable and productive.