Kdenlive 21 is available from Experimental repos: https://forums.opensuse.org/showthread.php/558629-Finding-adding-repos-installing-packages-for-Leap-15-3-from-quot-Experimental-quot-branch
Kdenlive 21 is available from Experimental repos: https://forums.opensuse.org/showthread.php/558629-Finding-adding-repos-installing-packages-for-Leap-15-3-from-quot-Experimental-quot-branch