Ubuntu 20.04 No Wifi Adapter Found. Lenovo Ideapad Realtek

To get the realtek 8852 PCI adapter working with Ubuntu, follow these steps:

1. Download dependencies:

    sudo apt-get update
    sudo apt-get install make gcc linux-headers-$(uname -r) build-essential git
   

2. Install 'fix':

   git clone https://github.com/lwfinger/rtw89.git -b v5
   cd rtw89 && make && sudo make install
   

3. load module:

   sudo modprobe rtw89pci
   

   If you are lucky, this is all you will need to do. The driver should be loaded. If not, you will likely know. The driver load attempt will have caused an error. If this is the case, click the source link below for details.

Source & src

Another Ubuntu user who used method with success (rtw89)