Probably some Batman fatigue setting in too.
People keep harping on and on about Nolan trilogy... but that's NOT the last time we saw Batman. We had Dark Knight rises back in 2012.. .so yeah, 10 years since that. However we also had Batman V. Superman 2016, Justice League 2017 and then even Snyder's Justice League in 2021 and those were trainwrecks that had a lot of people just sick of 'Batman'.
Batman really hasn't GONE anywhere for the public to actually MISS him yet.