Same here on Android. Push notifications did not work for me (i use blynk long time now… but never before push-notifications). Complete reinstallation was necessary to get push notificatiosn working - even the notification on hardware goes offline wasn’t working…
Can you add your Android device movel, OS version and app’s version?
me?
my android is lineageOS 14.1 aka android 7.1.2
device is bq - aquaris x5 plus
blynk app V 2.27.5
and it works now after complete reinstallation of blynk