The a51 screen protectors fit s20 fe, found the links on slickdeals and the protector fit perfectly for $4..also got 3 in total.

Here's a 3-pack for $5.50 with a camera hole, and comes with a tray that helps install on center 4.5/520 reviews https://www.amazon.com/dp/B07ZJB2...EFbG0WASFC

Here's a 3-pack for $5 with no hole, but does come with an installation tray. 4.5/92 reviews https://www.amazon.com/dp/B07QQTV...EFbSWZM9T7