https://www.techradar.com/news/oculus-quest-2-vr-headset-already-has-a-successor-on-the-way-says-zuckerberg
Speaking to investors, Zuckerberg confirmed that, “We’re continuing to work on new hardware as well. The new hardware will fit the same platform, so the content that works on Quest 2 should be forward-compatible, so that we’re going to build one larger install base around the virtual reality headsets that we have"
These comments certainly make it sound like an Oculus Quest 3 is in the works, though a vague affirmation to investors doesn't mean a release date is coming anytime soon.