It's unfortunate but we must face it. If peoples' hearing loss is so great they cannot hear the word of God their souls are lost for good.
Yes, there are groups called Christian made up of deaf people. They are not being honest, however, when they claim they know God. How can they know God when they have never had a conversation with Him?
The Bible tells us that in the beginning there was the word. And the word was God. Spoken words do not exist if no one hears them.
https://religionnews.com/2019/12/27/...-who-they-are/