你可能说的是Digital Registration on Entry吧? CDC 疫苗Card可以的

Coronavirus (COVID-19) - Federal Foreign Office (germany.info)

• Who is regarded as fully vaccinated or recovered?

• Travelers who received all the required doses of a COVID-19 vaccine cited on the website of Paul Ehrlich Institute are considered fully vaccinated (Comirnaty is known in the U.S. as Pfizer). It must be at least 14 days since the last vaccine dose was administered. On entry, travelers must have proof of vaccination in written (e.g. CDC card) or digital form (a cellphone photo is not sufficient). Vaccinated travelers must additionally show no relevant symptoms.
• Travelers who can prove they were previously infected with COVID through a positive PCR test, taken at least 28 days but no more than 90 days prior, and who show no relevant symptoms are considered to be fully recovered.