Digikam is the KDE equivalent of Picasa, or maybe Shotwell with the ability to handle large collections of video and images. It can also import your pictures, adjust meta data, tags photos, export them to social media and a whole lot more. It even has basic facial recognition.
To install Digikam on Kubuntu 20.04 open Konsole and type,
sudo apt install digikam
Enter your password and answer any questions and Digikam will install. After installation you can find Digikam in the Applications Menu by searching or under Applications/Graphics.