On Plasma I setted double click to open folders, instead of the default that is one click. So I just select a folder by using a single click Amarok folder view, instead opens folders when I click a single time, ignoring KDE Plasma settings that require two clicks to open a folder amarok-2.9.0-11.fc34.x86_64
Please be aware that Amarok 2.9.0 is based on Plasma 4, so even fi you run it on Plasma it will not respect its settings. You could switch to the Plasma 5 based version. Despite it being in Alpha stage, it is a full port and runs pretty smoothly.
(In reply to Myriam Schweingruber from comment #1) > Please be aware that Amarok 2.9.0 is based on Plasma 4, so even fi you run > it on Plasma it will not respect its settings. It's a problem that started to happen some months ago. Previously I used Amarok 2.x on Plasma 5 without any problem
Testing on Amarok 2.9.71+ and Dolphin 23.08.4 / Plasma 5.27.10, Amarok folder view follows the system setting. Changing the click mode in KDE System Settings makes Amarok immediately follow the new setting, without even needing a program restart. Was likely related to 4->5 changes and differences, but not relevant anymore with KF5 based 2.9.71+. Closing