It's seems Sony is not entirelly fine with allowing more games to have crossplay. People need to keep pushing for this.
Finn Brice, the CEO of Chucklefish, which developed and published the recent Advance Wars-inspired hit Wargroove, took issue with Layden’s characterization in a thread about the interview on the gaming forum ResetEra.
“We made many requests for crossplay (both through our account manager and directly with higher ups) all the way up until release month,” Brice wrote. “We were told in no uncertain terms that it was not going to happen.”