Shrimp is low carb, of course. The problem with this is it’s also shrimp tacos and tortillas aren’t low carb. You can buy special low carb tortillas, if you like.
If you want a low carb meal, there’s an easier way to do it.
Make the chile lime shrimp and, instead of making tacos, serve it over cauliflower rice. It’s a win-win for low carbohydrate dietary preference.