The dev builds are Android 10 Q. You are recommended not to install /e/ on top of a Custom ROM. Please check out installing an Android 10 Stock ROM first, so that you install /e/ on a sound base.
If you are is USA you might also search this forum for the issues Samsung users are having in USA – these are really Samsung issues rather than /e/.
https://community.e.foundation/search?expanded=true&q=Samsung%20%2B%20USA%20order%3Alatest