as the S7 was originaly released with android 7 nougat, I think twrp version most have to be related to this generation, on many samsung devices i know (s3 to s7) twrp 3.3.x-x is the best…
Welcome to the forum, and thank you to relate your “parcourt” to /e/ running on your phone. Congratulations.
It was complicated for me too, that decided me to stay on the forum hoping i can help new users switching to /e/.
[HOWTO] an Unified Install Guide Project for /e/