It would be great to let users disable/enable multibranch pipeline job, similarly as onther jobs. Especially if the logic is there already and working. If I manually edit the config.xml and set <disabled>true</disabled> the job can't be executed, but it does not indicate that's disabled - this should be rated as a bug actually. Thank you for hearing us!
There is no "Disable"/"Enable" button for multibranch pipeline job. But you still can append "/disable" or "/enable" to the job url and it will work! So the functionality is there, only UI element (button) is missing. Please add the button!