Q.Eugenia trees in pots: Won’t fill in and remain thin. See through trees!
Eugenia planted a year ago in pots on deck for privacy but they don’t grow enough leaves and remain “see through”. The tops have been trimmed back with no appreciable effect. Help.

Certified GKH Gardening Expert
There are many species of these. Some are shrub forms, and some are tree forms. It looks like what you have is a tree form. They can tolerate quite a bit of pruning, and need it to stay shorter. The type that you have may not be a compact growing shrub, and may be difficult to force into a compact shape.
It can be even more difficult to grow these in container. They can be slightly picky about the soil type, and especially picky about light. They require partial shade, so if that area gets too much sun, then this can prevent proper growth as well.
This article will help with the care of these: https://www.gardeningknowhow.com/ornamental/shrubs/eugenia/growing-eugenia-plants.htm