Where to include CC BY 3.0, CC BY 4.0, SIL OFL 1.1 attribution for Expo React Native mobile app?

Question

I want to cite the following

• One SoundBible Sound found here: Attribution 3.0
• FontAwesome5 (free license info) (used via react-native-vector-icons): react-native-vector-icons uses the TTF files so I'm assuming it's released under SIL OFL 1.1

My questions:

1. Should I include attribution text (author name, source url) and links to the license fulltext in a popup in the app?

2. Should I include the attribution text or fulltext of the licenses of these assets in a LICENSE.txt file in my project?

3. If yes to 2️⃣, should I also include the fulltext of licenses of my project's production dependencies and sub-dependencies inthe LICENSE.txt?

4. The FontAwesome License info page states that the attribution information is already packaged into the source files that are downloaded and there is no further action to be taken in terms of attribution. I don't see where this information is when I look in the react-native-vector-icons repository. If it is included in the asset files somehow, does that mean I don't need to add any attribution in my app and LICENSE.txt?

5. Since I use react-native-vector-icons which has an MIT License, should I be concerned at all about FontAwesome's license considering it's a sub-dependency?