I don't know of a direct way to get a list of only the things loaded for the current buffer based on filetype, but
:scriptnames will list everything that's been loaded, including system/default plugins, runtime scripts, etc.
To figure out what's additionally autoloaded for a specific filetype, start Vim with no arguments, run
:scriptnames, then open a file of the type you care about, and run
:scriptnames again. If anything new was autoloaded for the filetype, you'll see if appended to the list the second time.
You can capture the output (to paste into a buffer, for example) with
You'll see the output displayed, but it will also be copied to register
a. You can paste that into a buffer with