Not really the right place here but maybe someone knows, Google wasn't really helpful:

My fiancee and I will be flying from Bangkok to Germany next week. It's her first time out of Thailand. We're well prepared but I'm unsure about what documents the pass control at the airport in Germany might want to see. We have the letter of guarantee, invitation letter from guarantee and from local government, valid visa, "proof of relationship"(printed pictures from the pas three years), vaccine pass, pcr test results. Anything else you can think of? I don't want to risk any problems. Thanks a lot!