if you do wind up looking for an external crossover, this is the one I would look at. All analog, no digital in the signal path. I don’t have personal experience with it, but I have researched it a good bit, and found positive reviews. if you do wind up getting one, DM me with your thoughts on it.
https://sublimeacoustic.com/products/k231-stereo-3-way-active-crossover
45 day return policy. Their FAQ section is helpful.