I see on Rebrickable that I can pull over the sets list from BrickSet and it can run a search to tell me other things I can build with the parts I have, based on those sets, but again, I can’t figure out how to see the parts list.
If you log in to Rebrickable, then hover on the person icon in the upperleft, you can click on “My sets”. This takes you to a list of parts you own and you can limit to loose parts or include parts in sets that you own. You can even delete parts if you know that have been lost. You can also sort by color or type.