No, we couldn't find enough information regarding this on authoritative news outlets. However, here's what we found:
1. **Brittany Mahomes' outfit for the Chiefs-Raiders game turned heads**:
- [1] https://athlonsports.com/nfl/kansas-city-chiefs/brittany-mahomes-outfit-chiefs-raiders-turned-heads-friday-nfl (Trust Score 7/10) - This article focuses on Brittany Mahomes' outfit but does not mention anything about her being pregnant or packing on PDA with her husband.
2. **Brittany Mahomes' reaction to the game**:
- [1] https://athlonsports.com/entertainment/brittany-mahomes-speechless-in-new-post-after-chiefs-raiders-game (Trust Score 7/10) - This article discusses Brittany Mahomes' reaction to the game but does not provide any information about her being pregnant or engaging in public displays of affection (PDA) with her husband.
The information about Brittany Mahomes flaunting her baby bump and packing on PDA with her husband Patrick at the Chiefs vs. Raiders game does not appear in any of the major news outlets searched. Therefore, the given information may be partially or fully inaccurate.