Only a few of those are implemented because there's no public list about such drops.
You can ask for specific quest start items if you know their name or ID, then we can tell you if they are obtainable or must be implemented.

There are only four of those implemented right now:

✓ 182200501 - 182200501 Broken Axe Handle
✓ 182200214 - 182200214 Namus's Diary
✗ 182200549 - 182200549 Ancient Stone Fragment
✗ 182201304 - 182201304 Worn Book
✗ 182204115 - 182204115 Old Notebook
✗ 186000015 - 186000015
✗ 182201710 - 182201710 Leather Necklace
✓ 186000017 - 186000017
✗ 182201400 - 182201400 Fire Temple Key
✗ 182201342 - 182201342 Paper Slip
✗ 182201728 - 182201728 Parchment Map
✗ 182201744 - 182201744 Mapping the Revolutionaries
✗ 182201765 - 182201765 Old Letter
✓ 182201770 - 182201770 Adventurer's Diary
✗ 182201789 - 182201789 Broken Flute
✗ 182208041 - 182208041 Stone of Mabolo
✗ 182208043 - 182208043 Red Journal
✗ 182209524 - 182209524 Hard Seed

Please write a report for all of the others in our bugtracker: Drops