The easiest way to ensure you have the correct color tables is to edit the colormap, if the default is greater than 256 colors than it is GOES-16. This would be true of any of the GOES-16 individual bands. Some of the channel difference products and baseline products may have 256 or fewer colors, however.
This page on the Virtual Lab contains a list of default color maps for GOES-16 bands (as well as difference products and baseline products):
https://vlab.noaa.gov/group/goes-r-end-user-mission-readiness-project/awips-2
(search for goesr-diag Colormaps)
