Use the new package cockpit-client-launcher, use your username and password and be done with it. Here is what I have installed on TW, versions may be different on Leap but the package names should be the same:
knurpht@Lenovo-P16:~> rpm -qa | grep cockpit
cockpit-bridge-360-1.1.noarch
cockpit-bootloader-0.4-1.5.noarch
cockpit-podman-120-2.1.noarch
cockpit-subscriptions-16-1.1.noarch
cockpit-ws-selinux-360-1.1.x86_64
cockpit-360-1.1.x86_64
cockpit-snapshots-3.1-2.1.noarch
cockpit-doc-360-1.1.noarch
cockpit-networkmanager-360-1.1.noarch
cockpit-selinux-360-1.1.noarch
cockpit-devel-360-1.1.x86_64
cockpit-repos-4.7-4.1.noarch
cockpit-kdump-360-1.1.noarch
cockpit-client-launcher-356-1.1.noarch
cockpit-firewalld-360-1.1.noarch
cockpit-ws-360-1.1.x86_64
cockpit-system-360-1.1.noarch
cockpit-machines-348-2.1.noarch
cockpit-packages-4.1-4.1.noarch
cockpit-packagekit-360-1.1.noarch
cockpit-storaged-360-1.1.noarch
knurpht@Lenovo-P16:~>