If you’re completely deaf on that ear, then cross might make sense.
However, if not, I’d encourage looking at wearing TWO aids which communicate between themselves. Like, phonak marvel/paradise/ costco ks9.
It always make sense to try to aid bad ear. However it makes sense to help your brain to process that information, hence aid for good ear to make your life easier.
Cons of cross devices is that you lose ‘where did this sound come from’.
Cross means - just move the sound to the good ear.
Bicross is when you move the sound to the better ear but that better ear still needs help, so it’s an aid.
Tricross or ampcross is a name for a workaround that can be done with some aids, where you aid bad ear AND transfer the sound to the good/better ear and aid or not the better/good ear, depending what you need.
Check this video: https://www.youtube.com/watch?v=K9d1l0PwGA45
Marvels and paradises transfer sounds between themselves even in automatic mode, albeit lightly, but enough to notice something is going on.
But there are also custom programs to achieve so, like 360 or acoustic phone.
I wear that combo - aid for good ear for convenience and aid for bad ear to keep it and brain working since it’s not totally dead. Many pros think I’m crazy or whatever, but being able to really hear from which direction car comes (I test it when I close my eyes), and have improved comprehension as compared to having just bad ear aided, is definitely worth the price for me.