The concept of a Wookiee "life debt" is fully canon in the new Disney franchise.
For example, in the novel Star Wars: Aftermath - Life Debt, we get the following passage from Han about Chewie
“He’s a Wookiee, right? Kashyyyk, that’s where he comes from, that’s
his home. But it’s not his anymore. I’ve been there. I’ve seen what
the Empire has done. They ripped down the trees. They put cuffs and
collars on all the Wookiees. Some of them they cut open. Others they
ship off to work the worst jobs the Empire has on offer. They took his
home from him. I can’t abide that. I don’t have a home anymore besides
the Falcon, but him? He does. And he deserves to go home. He has a
family, too, you know.
“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.
“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. Bureaucracy and strategy and war planning? They made me a
general but I didn’t know a thing about any of that. I don’t follow
what’s on some…schematic. I follow what’s in here. In my gut. My gut
always knows the way.
And from Star Wars: Absolutely Everything You Need to Know;
Q. Why does Chewie get mad when Luke tries to handcuff him?
A. It reminds him of his time as a slave of the Empire, which
imprisons and enslaves many Wookiees. Chewie was rescued by Han Solo,
and pledged a Wookiee life debt to him in thanks