Well, bear in mind that Linux Mint doesn't ship with KDE, and it may well be other things need to be done to get out to work fully properly. Also bear in mind that it can be a resource hog (though comparisons if recent versions of KDE and Gnome 3 show it using fewer resources).
Installing KDE Plasma on Ubuntu. First, update your system's package source information by running the following command: sudo apt update. Then, install the kde-plasma-desktop package using APT. sudo apt install kde-plasma-desktop.

The desktop environments bluntly can be categorized into the following: Windows like for switching to Linux such as – Cinnamon, Budgie, or KDE Plasma. Simple with few configurations – Gnome 3, XFCE, Mate, or LXDE / LXQT. Low to Moderate resource requirements, for example- LXQT, XFCE, Mate. Flexible and adaptable- KDE Plasma, Cinnamon, XFCE.

KDE Neon. KDE neon takes the latest Plasma desktop and KDE apps and builds them fresh each day for your pleasure, using the stable Ubuntu LTS base. KDE neon User Edition is built from the latest released software automatically added and released as soon as it is tested. We also have Testing and Unstable editions built directly from unreleased

Yes, I use to but I do not run it on Linux Mint. If you go with Linux Mint + KDE install it from the official repos, I warmly recommend you to avoid the ppa installation for stability reasons. msanangelo • 9 mo. ago. better off going to kubuntu or nde neon. MortalShaman • 9 mo. ago.

but it installs 5.24.x. I was wondering how to upgrade to, or replace it with 5.26. Most of the google websites that I found either just explain how to install plasma (version not included), or instructions for Kubuntu which don't seem to work for me.
Install package: plasma-vault. It will be accessible via systray. It may be hidden so if it doesn’t show up, right-click on the triangle on the system tray, choose system tray settings, find it on the list and make it visible at all times. If you need it in dolphin through right-click, go to dolphin settings, services, mark vault entry. 3 Likes.
For Debian / Ubuntu / Linux Mint, there are deb binaries available to download but for a quite old version (Kvantum 0.10.5, released back in October, 2017). To install the latest Kvantum in Debian, Ubuntu or Linux Mint, you can compile it from source. To do this, follow the steps below. Install the build dependencies
To do that, open the Konsole app or another terminal emulator of your choice and run the command below. Hit the Enter key when prompted and wait for the command to finish installing the repository. When the Kubuntu Backports PPA repository has been successfully installed, you’ll be able to update your Kubuntu 21.10 installation to Plasma 5.24 vlliW.
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  • install kde plasma on linux mint