I think your bread looks great. I do have a few questions regarding your sourdough sponge? What was your liquid to flour ratio? How long did it take to create your sponge? The only reason I ask is that I have been working and experimenting with sourdough sponges for a couple years now. One of the reasons you don’t get the rise from your bread is that your sponge has not had the chance to develop. I usually won’t use a sponge until it has had at least 2 weeks to grow. You should also feed it every day and then every other day throw half out. I know it sounds like a waste but you can find recipes on line to use those “waste”. I also use to start my sponges with some fruit juice or fruit cocktail juice. Last but not least once I have a good sponge I dry it out on parchment paper and then seal it in a mason jar. When I’m ready add a little fluid and good to,go. Bread looks great!