Do you ever sit and think, and believe, it's never going to happen? That words wont ever come out?
Honestly deep in my heart I just can't ever imagine the day
Tyler was almost completely non-verbal till age 5. At 5, he got a few words, almost all of them useless.
By about age 7, he was using what I'd call "purposeful echolalia". He'd copy what we'd say (or what he'd heard in a movie) to make needs known. So instead of "I'd like milk, please" or something like that, he'd say "do you want some milk, buddy?" Which is what we'd ask HIM, but it still made it known he wanted milk.
Nowadays, he's still very echolalic. He repeats Disney movies, WWE wrestling, and Phineas and Ferb episodes constantly. However, he now can have an actual two way conversation on quite a few topics. If he gets frustrated or doesn't understand what's being asked he still says 'I don't know Mother!' but in general he does so much better.
If speech doesn't actually ever come, that's still not the end of all hope. You can look into facilitated or assisted communication. There are some very impressive people in the Autism rights movement that are completely non-verbal, and they use assisted communication and typing to make their thoughts known. Non verbal doesn't mean no voice, it just might take more effort to have that voice.
Here's a link by Amy Sequenzia, she's one of the non-verbal autistic adults I mentioned. She's an author and an advocate, and hopefully if you read her stuff you will see there's hope. https://ollibean.com/2012/07/12/amy-sequenzia-just-me/
Your child may be like mine, and just take years and years to find her voice, or she might be like Amy and need outside assistance to find her voice, but she'll find it someday.