At this time there is no method
Unfortunately, there isn't a way to do this. The spell components are simply the spell components and there currently no way to add a component that isn't listed.
I had a similar issue with the Bardic Instruments and their ability to only work on spells that Charm to force disadvantage. There just weren't/aren't a lot that ...
Anywhere in 30 ft.
I don't have access to Van Richten's Guide to Ravenloft, but based on the description of the features you have provided the "melee spell attack" from the 2 result can be made against any target that is valid as described in the main Tales from Beyond feature, i.e. "one creature you can see within 30 feet of you" ...
Yes, the Dancing Item is a creature when animated.
To explain it, we can refer to the Monster Manual, in its starting pages detailing what a monster is, in particular under the Type section (added emphasys mine).
A monster's type speaks to its fundamental nature. Certain spells, magic items, class features, and other effects in the game interact in special ...
Just because the text is similar does not make them become the same. The rules for a dancing item state very clearly that it is an item, not a creature. As such, it is not a valid target for anything that can only target creatures like bardic inspiration.