##TL;DR: Chewbacca's life debt still exists in canon, but Han has essentially released him from it.
The life debt exists:
“I saved him, at least that’s what he says, the big fuzzy fool, but really, he saved me. I was on a bad path, and Chewie, he put me straight. Saved my shanks more than once, too. He said it was part of some life debt — he has a word for it, but if I try to say it in his tongue I’ll probably strain something. Even if I can’t say it, I know what it means. It means that he owes his life to me."
- Star Wars: Aftermath: Life Debt
It is still valid, but Han effectively released Chewie from it, by ordering the Wookiee to go back to his family:
“No. No! You have to stay here. We fought like hell for this and now... this is yours. Okay? All yours. This is home. You got people here and I want you to find them, You hear me? That’s my last demand. No arguments.” Chewie rumbles but Han reiterates, more firmly this time: “I said no arguments. You be with your family. I have to go start mine”...
“I’ll be back. We’re not done, you and I. We’ll see each other again. I’m gonna be a father and no way my kid won’t have you in his life.”
One more bark and yip as Chewie pets his head.
“Yeah, pal. I know.” He sighs. “I love you, too.”
- Star Wars: Aftermath: Life Debt
And Chewbacca did as Han told him:
I wonder how Chewbacca is doing. Her husband’s old Wookiee partner had settled back into a peaceful domestic life on Kashyyyk. As difficult as it was for Leia to imagine Chewie being content at home, he’d remained there long enough that she had to conclude he was enjoying himself. Her husband’s old Wookiee partner had settled back into a peaceful domestic life on Kashyyyk. As difficult as it was for Leia to imagine Chewie being content at home, he’d remained there long enough that she had to conclude he was enjoying himself. Han never passes along Chewie’s holos; I need to make some time to catch up, and soon.
- Star Wars: Bloodline
Han doesn't think the life debt makes sense any more, because in Han's eyes, he's the one who owes Chewie something:
The galaxy is changing, and with peace now a possibility, some dare to imagine new beginnings and new destinies. For Han Solo, that means settling his last outstanding debt, by helping Chewbacca liberate the Wookiee homeworld of Kashyyyk...
“But that’s a hot cup of bantha spit, is what it is. He doesn’t owe me. I owe him. I got a debt to Chewie to get him his home back. So when this chance came up, I leapt at it. The rebels, or the Republic, or whatever they want to call themselves? They didn’t want any part of it. I made it clear, we need to make Kashyyyk a priority, but they waved me off. Not strategically significant, they said. Not yet. Soon. Blah blah."
- Star Wars: Aftermath: Life Debt