u/Big_Address_5047

I'm an Indian citizen who studied medicine in non eu country (Serbia). I already have a B2 and the certificate will expire in 1 month (1 year expiry rule for India) for 16-d visa this July.
I want to apply for Chancenkarte instead to go to Germany. The thing is I still haven't applied for Approbation yet. Is Eingangsbestätigung or any confirmation of application required for Chancenkarte?