In the EU, esp. in Germany, there are legal restrictions concerning the genetic analysis, genetic data and using these data. (General Data Protection Regulation
REGULATION (EU) 2016/679 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 27 April 2016
on the protection of natural persons with regard to the processing of personal data and on the free movement of such data, and repealing Directive 95/46/EC)
You are not allowed to analyze the genome of a person without the consent of this person. No medical or genetic lab will do a genetic analysis without the concerning documents. The fine ist up to 50 Million €
Furthermore legally there are no public data available for comparing the genetic sequences. To find relatives, you got to have their genetic data. Its about the same procedure like the genetic analysis of parenthood.