The thing-in-itself reified as God is intelligible but being able to be thought can effect sensibility to produce various feelings."But though the moral law thus gives us a ground of determination which is independent of any sensuous condition and consequently is purely intelligible, yet, as determining ground of a being that belongs to the world of sense, it must be able to affect the sensibility of this being and thus must produce a feeling of pleasure or pain, of which the latter is called the moral feeling. ...."
Kant had proven the idea of God is a best an illusion can never be a real thing which the senses can interact directly like seeing a real apple.
The noumena aka thing-in-itself traceable to the idea of freedom, soul, the-World and God are at best illusion and never real in the sensible dimensions.
we cannot have knowledge of these things;Kant also argued that his ethical theory requires belief in free will, God, and the immortality of the soul.
Although we cannot have knowledge of these things, reflection on the moral law leads to a justified belief in them, which amounts to a kind rational faith.
Thus in answer to the question, “What may I hope?” Kant replies that we may hope that our souls are immortal and that there really is a God who designed the world in accordance with principles of justice.
https://iep.utm.edu/kantview/
no knowledge mean cannot be real in the knowledge sense, i.e. the empirical FS.
What Kant imply is;
freedom can be justified within a moral framework and system,
but there is no way
we can claim it is real within the scientific-FS sense.
What can be justified, i.e. justified within a FS does not confer it is real in the scientific sense.