Any solutions to keeping my sony da4es receiver and being able to hook my surround sound up to TV and smart TV?
Connect everything (cable box, disc player, etc) to the tv, then use its optical output with your old receiver. You may need to set the tv to PCM output.
You could try cheap HDMI extractors (HDMI in, optical out) but I don't know how well they work. There's also the Essence Evolve II-4k which can do optical or even analog out. Again, I have no experience with that product but it's worth investigating.
Good luck!