https://discuss.getsol.us/d/2219-installing-realtek-rtl8821ce-wifi-driver
I'm not sure if rlt8821CE is using the same driver as rtl8821A but you can try. The problem with rtl8821CE doesn't seem to persist in newer versions of solus (or its just me?), I had issues (like 9 months ago, installed with budgie desktop) with it and now it works for me out of the box after fresh install (with budgie desktop as well). Cheers.