Apex300 + B230

Hi! I have upgraded my inverter setup (AC200Max and B230) with an Apex 300 to cover a few use cases I could not cover with AC200Max.

I see that B230 is not supported by Apex300 despite other large-ish extra batteries receiving the support treatment.

Is there a reason why B230 is not working with Apex 300?
I currently have my AC200Max + B230 connected to Apex via DC output (cigarette + RV cable) to somehow expand the capacity instead of switching the inverters and / or charging Apex300 from AC200Max AC.

Having B230 connected to Apex300 would make things a lot easier as well as give me a possibility to pass the ac200max along to someone else in need and replace it with B300K, ultimately making it an Apex 300 + B230 + B300K Combo