Curious if it was included but never talked about so they could grab (much) more real world test data and finish developing the software for it. (I'm no doctor

Curious if it was included but never talked about so they could grab (much) more real world test data and finish developing the software for it. (I'm no doctor / scientist) but I'd imagine trying to determine blood oxygen levels accurately would be much more difficult to get right with a (assumingly) small test group they might have had access to.