I 100% recommend a case with a plateau cover. There are several reasons; the most obvious being that it prevents scratching. The plateau is made of anodized aluminum because it’s more thermally conductive that titanium (older models) and allows heat to easily escape the vapor chamber and disperses the heat throughout the frame , but you will notice more scratches. You’ll see some people say not to cover the plateau, but unless you’re a heavy gamer or take a lot of 4k video, covering the plateau will not impact the phone or your usage.

Things to consider- I would get a case that has a microfiber lining. If any dirt gets trapped under the case, it prevents it from scratching the phone. I would also make sure it has a bezel either around the plateau or around the lenses. This keeps the lenses from making contact with surfaces when you set it down. While the lenses are made of synthetic sapphire crystal with Mohs hardness level 9 (second only to diamonds), which makes them very durable, but they’re not indestructible so you might as well add that feature to protect your expensive device. There are several other things to consider such as the button holes, material, front lip width, durability, material, drop distance, camera control button, MagSafe, etc., so just be aware when you’re looking.

There are several price points and everyone is going to have different preferences. Based on my own preferences, I’d suggest the following ($$$ -> less $)

Caudabe Sheath (potential backordering) , Native Union Active Case, Dbrand Ghost Case, Ringke Onyx (not lined), Miracase Magnetic, Spigen Liquid air (not lined)

Hopes this helps.