TouchableOpacity extends TouchableWithoutFeedback, so you can just use the disabled property :
<TouchableOpacity disabled={true}>
<Text>I'm disabled</Text>
</TouchableOpacity>
React Native TouchableWithoutFeedback #disabled documentation
The new Pressable API has a disabled option too :
<Pressable disable={true}>
{({ pressed }) => (
<Text>I'm disabled</Text>
)}
</Pressable>