We'll "hear" something this year.
That's a very hedged answer. We can hear "something" about FFVII-R's next part literally from now until December 31st 2022. I'd bank on getting a teaser trailer during E3 in June at the earliest. And that's optimistic.
Realistically speaking, I'd expect a teaser at Jump Festa near December of 2022.
Like, honestly, I want them to wait as long as possible before dropping ANYTHING related to Part 2, because once they do, that starts the clock and raises expectations for release. They seriously dropped Part 1's announcement too soon and it took years before the game actually was close to being actually close to finished. There's simply no reason to fallback onto the Versus XIII strategy of dropping ridiculously early beta footage over and over again to generate hype and prolong the guessing of when the retail release date will come. It's pointless and gets people's hopes up for things that might not even exist.