Can't you just go directly into the sites of the licensing companies? They have all their titles listed there.
There's not that many English publishers - you can just view them separately: https://www.novelupdates.com/list-english-publisher/
Some translators might acquire rights to novels. For example, this novel from Volare: https://www.novelupdates.com/series/doomed-to-be-cannon-fodder/
Because there is no reason to add a filter that lets you stay away from official releases, those are the first releases you should be going after, not the other way around.