Drivers have nothing to do with the desktop environment. Most are provided by the kernel.
Perhaps peruse related posts on the archived forum:
https://archived.forum.manjaro.org/search?q=Rtl8822be
Please post your system information as outlined here:
Please also post the output of:
lspci -nnk | grep -iA2 net
You also should actually tell us what problem you’re having with your Wi-Fi.
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