I use KS10 constantly for two years and had a vartiety of small quirks at first.
I would definitely unpair and remove all devices from bluetooth and add them back starting with aids. Test aids as only b t device.
My phone is paired to my aids, a speaker, galaxy buds pro, galaxy watch and car. The speaker is also paired to my computer. All works fine except if I leave car with phone, it switches to phone permanently (have to power cycle car audio or choose in bt on phone). I have to manually choose the speaker to use it as a mic instead of the aids.
I would think all aids should perform at least as well. I have a variety of issue if I get 40ish ft from m y phone.
I think you could easily convince a vrrizon, att, apple store to loan you s phone or try one instore for 30 to 60 minutes.
Phone is galaxy s23 ultra.