I haven’t tried it but if it works the same as a mobile OS you long click to select. Single click to execute.
Edit: apparently that’s not how it works. There is a checkbox on every icon that you have to click directly on the check box to select/unselect.
KDE Plasma. It came on my steam deck which was my first intro to it, it blew me away and installed it on my laptop and finally ditched Windows shortly after. Works great for me.