Not all fonts are collected in a package.
This is for InDesign 14.0.2 x64
To reproduce the issue, package any file and be sure the include fonts option is ON.
Expected result is, as it ever was, that all fonts used in the document will be included in the "Fonts" folder of the resulting packaged file.
Actual result is that some or all of the fonts are omitted.
Marc McNaughton shared this idea