:)
Here's another thread with question about red in face, it's nothing to be concerned about.
https://www.backyardchickens.com/threads/is-this-area-supposed-to-be-bright-red.1583139/
At 5 weeks old I wouldn't expect to see much development on comb and wattles. @Flowerladies - is the redness there all the time or does it come and go?
Buff Orpingtons can be hard to tell sometimes but that comb and wattle coloring at 5 weeks is very suspect. It should be more clear by 12 to 14 weeks or when/if it starts trying to crow. As far as the actual comb not being red, they can take time to fully color up.
It's a shame you can't keep...