How do i make a widget interactable interact with a static mesh or any other actor that is not a UI element using BluePrints.
You can have a widget as a component in a blueprint. A much easier way to have things ‘floating’ above a mesh for interaction
so no way to do it without attaching a widget 
Lots of ways to do it, this is just the most direct.
You can make a blueprint, that when you walk up to it, will add a normal widget to the screen, and you interact with that.
It’s really up to you.