Doubtful. They are still struggling in this area (too many chat services/all over the place with chat products) and theres talk that hangouts in gmail will be phased out/go away at some point.
Hopefully they work something out/get more unified as a integration into gMail chat would be great.
"But Hangouts itself isn’t long for this world. Last year, Google announced that it would split Hangouts into two different products: Hangouts Meet and Hangouts Chat. Hangouts Meet will encompass the video conference aspects of Hangouts and Hangouts Chat will focus on the instant messaging side.
Currently, the full-featured versions of both Hangouts Meet and Hangouts Chat are reserved for G Suite customers only. The vanilla Hangouts is still available on the Google Play Store, but who knows for how long.
Best use: Hangouts is honestly great at everything it does. However, as noted at the beginning of this article, Google doesn’t want a one-size-fits-all messaging app, so who knows how long we’ll have Hangouts."