I also upgraded from an S8. I got this case for the FE: https://www.amazon.com/dp/B08C943M8G/

The phone still feels slim, but has more grip. The case also has a raised bump around the camera, so no worries about scratching anything.

https://www.amazon.com/dp/B08C943M8G/ref=cm_sw_r_cp_apa_i_b1VHFbSWT6X1W

Spigen made a case for the FE.

I've got this one: https://www.amazon.com/dp/B08C943M8G/

I had a similar case for my S8 and it was great. Minimal and great protection. It has a raised lip around the top and a raised lip around the camera. I also have a glass screen protector and the case doesn't interfere with it.

https://www.amazon.com/Spigen-Rugged-Designed-Samsung-Galaxy/dp/B08C943M8G/ref=sr_1_1?crid=323E18KO5VWJQ&keywords=spigen+carbon+s20+fe&qid=1657747343&sprefix=spigen+carbon+s20f%2Caps%2C274&sr=8-1

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Had this case on my last 2 phones (S9 and S20FE). It's all you need.

I'm in the same boat. Eyeballing this one on amazon.