Hello @bauduen, the S7 currently still runs with /e/ OS 7-nougart. Since there are no official Android security leases since last year, the /e/OS Build Team has to do a lot of work to generate security leases from higher Android versions (8.x / 9). So it may still take some time.
However, there is a little bit of hope: /e/ OS 8-Oreo has been tested for the S7 / S7 Edge for two months. Improvement is coming in small steps …