Not sure what you need to drive with it, and I’ve only ever used one so very limited experience; most look rather low output. I use a Esinkin BT Adapter with powered bookshelf monitors and other audio amplifiers with RCA inputs. I’ve never measured the output so perhaps won’t do what you want. It’s got one button on the top of it for pairing and runs on 5v.
Would it be possible to add a small line driver to boost the signal slightly? Those use to be a thing in car audio.
I no longer have a workbench / scope setup or I'd measure it, I'm guessing the Esinkin is not going to put out much voltage to drive your gear either, heck the specs don't even state anything about the output level, but it works for studio monitors and such when i need to use it.
Not much help, but a thread bump I guess.