Because for whatever reason, Frontier are not answering this question in the forums (as far as I have seen). Here is their answer on Twitter:@sallymorganmoore can you please elaborate on whether the dev post tomorrow is instead of a stream or if they are still part of the (monthly) plan?
Source: https://twitter.com/elitedangerous/status/1409789298853961733
And also, because Frontier haven't specifically said "There's no dev stream" in the Twitter post (why are they being vague again?!), I have asked the CM's directly. Answer is no, there will not be a livestream with the devs. At least not this week. Who knows about the future?