There are a number of site collections that need to have a same top navigation. Currently, only main site collection has 3 level top navigation with structural navigation mode. However, it seems to me there is no possibility to deploy 3 level global top navigation across the site collections through SharePoint UI.
I have tried managed navigation but unfortunately it limits to display only up to 2nd level when "Use this Term Set for Site Navigation" is selected.
Is there any suggestion or tweaks that can be done the job?