It should work with any more current kernel and free modules (Tested with Trisquel and linux-libre): pre-requisite: get a current GCC/G++ version, the system-shipped one is likely too old (I've used GCC 9.2 as the kernel was built with GCC 9.3) steps to install:

# common pre-requisites
sudo apt install built-essentials git

# in any case you need the headers matching your kernel,
# I highly suggest to use linux libre as follows
sudo apt linux-libre linux-libre-headers

# WiFi
git clone https://github.com/lwfinger/rtlwifi_new.git -b extended
cd rtlwifi_new
make CC=gcc-9 CXX=g++9 && sudo make CC=gcc-9 CXX=g++9 install
cd ..

# Bluetooth
git clone https://github.com/lwfinger/rtl8723au_bt.git -b kernel
cd rtl8723au_bt
make CC=gcc-9 CXX=g++9 && sudo make CC=gcc-9 CXX=g++9 install

# common bluetooth packages
sudo apt bluetooth bluez bluez-tools blueman

Previous description about Trisquel: Worked on Parabola/Linux-libre, module was loaded without the firmware blob and it just worked. In the module source the path to firmware binary can be dummy. It only takes a bit longer to connect/search. Needs adaptation in source. Previous description about Trisquel: Non-free firmware is required, see https://wiki.debian.org/rtl819x