In the box
A power supply
The adapter, or the cable to a USB port, or in some cases nothing at all.
0
Listings that state it
out of 52 in this catalog, in the listing text quoted on this site.
52
Listings that say nothing
which is not a claim that anything is missing from any box.
Nothing in this catalog states a power supply as part of what ships. Not the players, not the televisions, not the bars. The subject is absent from every listing quoted here.
One of the 52 listings says something adjacent and more interesting: it states that the device is powered by the television. That is not a power supply in the box, it is the absence of a need for a power supply, and it is the only statement about power anywhere in this catalog.
This page exists because a power question is discovered at the same moment as a cable question, in the same evening, with the same amount of patience left.
No listing here states it
Fifty-two listings, and none of them raises the subject. There is no table here because there is nothing to put in it, and that absence is the finding rather than a gap in the research.
Overlaps that turn on this
Sources
Product facts on this page come from the listing text quoted here, in the seller own words. Statements about published standards come from the bodies linked above and from nowhere else.