There is a place in my city that is very similar (called Ekko de Brasil), and while we were on our first whole30 we called them to ask about their meats (as we had been before and loved it). They were very friendly and helpful. Broken down, here is what they said:
-Chicken breast wrapped in bacon: The bacon has sugar, but they were willing to cook just chicken breast and omit the bacon as a special request.
-Chicken Drumstick: Marinated in beer. Not compliant.
-Parmesan Pork: Not compliant (cheese)
-Sausage: Had sugar. Not compliant
-Lamb: Marinated in wine. Not compliant. -Beef (striploin, ribeye, brazilian, prime rib, garlic beef): All compliant. Only seasoning used was salt.
As for their buffet portion, they had olive oil and balsamic that was compliant as a salad dressing. Veggies & lettuce were also obviously compliant, but that was about all from the buffet potion that was good.
So if Texas de Brasil is similar, it may be a viable option. You would have to call and ask in advance though.