All news outlets saying he will resign (though will be PM until replaced in Autumn).
On the other hand: https://www.spectator.co.uk/article/live-cabinet-resignations-continue
9.29 a.m – Will Dominic Raab take over?
James Forsyth writes... There is a growing view among ministers that Dominic Raab should become interim PM and Boris Johnson should leave immediately. The idea is that Raab would simply bring back everyone who had resigned and government could then continue.