We are constantly improving drawings in Fusion 360 - in August 2021, editing Parts lists is a bit of a workaround.
Make sure you check out the blog post to understand the full context of the video: https://clintbrown.co.uk/fusion-360-q... Here' you'll find step by step information, as well as other related info! I've got a follow-up video on the website showing how you can edit all-level parts lists.
Check out the roadmap: https://app.mural.co/t/autodesk2145/m... you'll see that we have a project to improve this (bottom right hand corner under BoM's). Chances are that if you're seeing this post in the future that this workflow will be obsolete!
One more thing! The sweet tune in the background is courtesy of the extremely talented @Julianjvr / julianjvr