Hi
I contacted support since I'm a paying subscriber now. They do have a workaround which are instructions on how to manually carve the profile with other CAD tools for NPT etc. If you are a paying subscriber I encourage you to write in and say you would like tapered threads finished. Reference feature:FUS-67706
Here is the link for the workaround:
Modeled NPT Threads
https://knowledge.autodesk.com/community/screencast/3ca46950-d9e3-4aac-81b5-83755d713f3a
I'll summarize in case this link goes dead in the future.
1. You make a hole with tapered sides using the hole command and the countersink feature. The diameter, sides & angle presumably match the tapered hole dimensions of the type you want.
2. Using the coil command start the coil in the hole center with the diameter of the wide end of the hole. Set the coil to cut and go down through the hole. See example below. I imagine some consulting machinery's handbook etc. on NPT or tapered thread forms is going to be required.
I hope this helps some at least.
