This image was done with the tools on my phone (Galaxy S22 Ultra). I took it to greyscale then adjusted different parameters to bring out the ring. It was almost impossible to see anything in the ring with color. It was lost in color noise.
I just don't use Siril enough to know exactly how to get the best out of an image. I do need to try though so a can see how Seestar handles gravitational lensing on Abell 2390! I manually entered the coordinates. Abell is left of center.