Doha embassy has there own Supporting documents checklist like the one attached here, make sure you don’t miss anything which is applicable to your case. Wish you all the best
@Sal A. this is the best advice you can get given that I didn’t receive the email either. I did print my interview schedule email and K1-FTP mail and that’s all I took with me to Doha Clinic. All the best man and stop overthinking everything is gonna be ok