It is. I saw GD had the space in their dates a while back and thought it just would be so not Coachella and to adapt them their booking policy would have to start being good again.
Gaga they've absolutely chucked the cheque at given she doesn't even have any dates in place yet. I'd guess Gaga is replacing Rihanna and Green Day weirdly enough Kenny. I can't see Post not having been an original option.
Guess that explains the links with Amber Bain aka The Japanese House, given Daniel has produced both of her albums. I know that Amber both sang on a remix that's on the second version of Brat and is confirmed as Charli XCX's support for these new Dublin/Belfast dates.