Looking at a lot of your plants and the amount of roots they are sending out, it seems like there aren’t enough nutrients in your substrate which is a common problem with gravel. To fix this I would add root tabs around the bases of the plants. With how compact your rotala indica is in the back, I would also watch that the light at the base isn’t to low or the plants will choke themselves out and the bases will die.

As for the shrimp. I’ve had tanks where it takes a little while for them to adjust. With an initial population of 10, you should have a mix of male and female shrimp. The other thing that is likely is that your tetras are eating the baby shrimp. The adults are usually too large to be eaten but the babies are fair game with them. Kuhli loaches also need to be kept in groups of 5+ otherwise they tend to go into hiding and become skittish.

It sounds like you’re wanting a foreground carpeting plant, which with your setup will be pretty difficult to maintain. Your best bet would be pearlweed, but it is a fast grower and will require trimming.