I’m really sorry to hear about the losses, I know that’s frustrating, especially after taking the time to drip acclimate properly.
While shipping stress can play a role, losses within the first 24–48 hours are most often tied to differences in tank conditions. Even when parameters look “perfect,” things like subtle swings in pH, KH/GH, temperature, or TDS can be enough to stress shrimp during the transition. Four-hour drip acclimation helps, but if the parameters differ significantly, that transition can still be hard on them.
Regarding the shrimp themselves, what you’re describing sounds normal for juveniles. Younger shrimp often don’t show full coloration yet, and features like a racing stripe or patchy/clear coloration are common at that stage. Their color will continue to develop as they mature. Sexing can also be tricky when they’re small, but its not impossible, but it becomes more apparent as they grow out.
It’s a good sign that the remaining shrimp are active. That usually indicates they’ve adjusted and should continue to settle in, grow, and reproduce with stable conditions.
If you haven’t already, please review the DOA policy and send photos within the required timeframe if applicable, and I can take a closer look for you. I’m happy to help however I can.