Credit goes to madscintist.
sudo su
# install required packages
apt install build-essentials dkms
cd /usr/local/share/ && \
wget https://github.com/EntropicEffect/rtl8822bu/archive/9438d453ec5b4878b7d4a2b4bcf87b37df09c3fb.zip -O rtl8822bu.zip && \
unzip rtl8822bu.zip && \
rm rtl8822bu.zip && \
cd rtl8822bu-9438d453ec5b4878b7d4a2b4bcf87b37df09c3fb
# add and install kernel module
dkms add .
dkms install -m 88x2bu -v 1.1
reboot