Just done a fresh install of Ubuntu 20.04 LTS on a Lenovo Yoga 530.
I am having issues with my network, it's unrecognised.
*network UNCLAIMED description: Network controller product: RTL8821CE 802.11ac PCIe Wireless Network Adapter
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UNCLAIMED means Ubuntu is recognizing the hardware, but it needs a driver for it to work. Thanks this card is really common and there is a driver on Github for it.
You will need an ethernet connection and follow this steps on your terminal:
sudo su apt install -y dkms git git clone https://github.com/tomaspinho/rtl8821ce.git cd rtl8821ce ./dkms-install.sh modprobe 8821ce
After completing that steps, you should be good to go, and your card should be working.