The notifications from Line don’t show up.

I accidentally pressed the “turn off notifications” button when I looked at a banner notification from Line, after which there were no more notifications in the notification centre (the one where you swipe up on the lock screen). I have gone to settings to turn off its notifications completely, then turned them on again, but the notifications from Line still don’t show up. I am on IOS 13

[Re-Titled by Moderator]