I've been using the glass screen protectors by Bodyguardz for years. They are clear sheets of tempered glass that stick directly on top of your iPhone's screen.
While dramatic falls have cracked the screen protector, they have left my actual iPhone screen unharmed. And, to me, they feel and look the exact same as a normal iPhone screen.
The best part: Bodyguardz gives its customers free lifetime replacements for its screen protectors. Just register the screen protector you've purchased online; if it cracks, then you can order a free replacement screen protector and just pay for shipping.
You can purchase iPhone 11 tempered glass screen protectors on Bodyguardz's website. Models for the iPhone 11 and iPhone 11 Pro range between $39.95 and $49.95, and models for the iPhone 11 Pro Max range between $49.95 and $54.95.