The reason I've posted is that I've seen baby photography online that doesn't necessarily always use what appears to be the most appropriate positioning for newborns according to what I've learned in my field of birth to three development. Photographers or instructors may not realize (at least in some videos I've seen) that some of the poses for the photos aren't particularly what would be considered the best to use.
Here's the concern - I looked online and found the info. posted below - in slings the baby's chin should not be down on the chest. In this info. from the CPSC site it shows a chart/diagram where on the left it shows the best way to position a newborn infant in a sling style device, and to the right it shows ways that a baby should not be positioned. I didn't realize til I read this that within 1-2 minutes with the chin down on the chest a baby can start to slowly suffocate.
My concern with the positioning I'm seeing used in photos where the baby is propped up on elbows with the chin in the hands is that it would seem to be extending the neck in an awkward position; I haven't yet found any info. on whether or not that affects the airway but I doubt many parents or caregivers are putting babies in that position so there may not be any particular info. on it. The problem with the baby's chin dropped down onto the chest is that it could be affecting the airway and a baby may not be able to cry to indicate being in distress. I've shared this because I think it's a serious concern.
Infant Deaths Prompt CPSC Warning About Sling Carriers for Babies | CPSC.gov