R lidR stdmetrics_z

When using stdmetrics_z in the R package lidR, it produces 36 bands of metrics. I am unable to find the definition of each of these bands (metrics). In the help it says to view the wiki page but there are not 36 metrics listed pertaining to z values. When I view the output tifs in ArcGIS Pro, they are simply sequentially labeled from 1-36 with no additional information.