I believe it is Catholic (perhaps Orthodox too) teaching that there will be no more public revealation until Christ returns. There can be private revelation and there can be a growth of understanding regarding public revelation but nothing “new”.
God has revealed Himself to us by means other than Scripture. The purpose of this revelation must be emphasized and that is so people will turn to Him and turn to His written, oral and living Word. We call these Scripture, Tradition and Christ. All of which are protected and taught by the Church.
One primary way He has done this is in the glory of Creation. Another is through what is called natural law.
I’m sure there are others. It must be remembered they are not a permenant substitution for the public revelations found in Scripture, Tradition and in the person of Christ, Jesus. They are meant to lead us to the fullness of Truth not to replace it.
Some would argue (me included) that "Tradition" can be a form of revelation from God, in the sense that it represents the gradual unfolding of His will as we live together within the Body of Christ.
After all, For where two or three are gathered together in my name, there am I in the midst of them. (Matt. 18:20).
Of course, Tradition can be misused or misconstrued.... as can Scripture.