Can the Apple Watch 6 blood oxygen sensor be worn on the inside of the wrist instead of the back of the wrist?

See the 'A better fit means better readings' section in:

Wearing your Apple Watch - Apple Support

"...In addition, the sensors will work only if you wear your Apple Watch on the top of your wrist."

I've been wondering the same thing. I wear a 3 on the inside of my wrist and still get all the readings offered. It does a great job with sleep detection and heart rate. I'm curious, then, if the "will work only" is true or if Apple just has not fully tested it anywhere on the body but the top of the wrist.