Hello, I can understand your concern, but there are some apps like AODNotify or something else which simulates like led. It isn't perfect but ot does. I'm not using any of them. Because I see most from lock screen what I was missing.
So if I'm correct you want to see almost fully readable or hide whatspp notification in the lock screen. If yes then you can do this.
Hide WhatsApp Messages on Lock Screen on Android Phones and Tablets
These are steps which you can follow on to hide message summary of WhatsApp Messenger on Lock Screen:
1-) Go to settings of your phone or Tablet.
2-) Tap on Apps. (Sometimes it can be “Applications” on some devices.
3-) Tap on App Manager. (It doesn’t exist on some devices. If it doesn’t also exist on your device, please ignore this step.)
4-) Tap on WhatsApp.
5-) Tap on Notifications.
6-) Tap on “On lock screen”
7-) A menu will appear on your phone screen. Tap on “Hide Content” or “Do not Show Notifications”
Summary of steps:
Settings > Apps > WhatsApp > Notifications > On Lock Screen > Hide Content / Do not Show Notifications
Samsung Galaxy Note 20 Ultra