I previously had a galaxy s9 & recently got the s20. I have noticed there is no selective focus which was my favorite style to use. Is that going to be available in a future update? I truly hope so! Thanks!
Smartphones these days can use either "live focus" or "selective focus" to produce a bokeh effect but there's a difference in how they produce this effect.
Try selecting your favorite mode by tapping on More > Edit, and drag and drop your favorite modes to the bottom ribbon.
For more information, you can visit this website. https://techgarage.blog/en/what-is-selective-focus-on-samsung-one-ui-phones/
I hope this helps!!