You can swipe up on a floating notification to temporarily hide upcoming ones.
1. Go to
Settings > 
Notifications & Control center.
2. Tap Floating notifications in NOTIFICATIONS.
3. Tap
beside an App to enable Floating notifications.
4. Tap Hide temporarily to set hide time for floating notifications.
1. Go to
Settings > Notifications & Control center.2. Tap Floating notifications in NOTIFICATIONS.
3. Tap
beside an App to enable Floating notifications.4. Tap Hide temporarily to set hide time for floating notifications.