The plastic screen protectors for the S20 are not very good. A new phone needs protection to keep it from being damaged. If you want the best experience, you should upgrade to a better quality screen protectors that work with the Ultrasonic screen protectors. The best screen protectors for the S20 are listed here.
You'll want to be aware of the fact that the screen protectors on the S10 have a tendency to interfere with the fingerprint sensor. If the in-display fingerprint sensor is important to you, you should stick with the flexible film screen protectors.
The top recommendation is the ArmorSuit Military Shield. Changes are made to the installation process to fix any mistakes. The self-healing film should buff out small scratches and dents so you don't have to replace it as often.
The Whitestone Dome Glass has a UV-curing system that makes it less prone to problems with the fingerprints.
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It's comforting to know that your top-notch phone is now safer than ever.