I need an approved list of German resources for GSA link building. Where can I find one, sorted especially for German? If there is no such, just common big list for GSA would be ok.

Yes you can do this,, automated backlinks from German sites.

I m sure that it was technical issues. It will be good to check the google search consol.

As you mentioned that "Website Designers in Delhi". When you search on google or other search engine you can't see your website. I think k you did not perfect SEO or SEO strategies.

and your problem could be Technical SEO related like index issues, site map, page speed, spam score, most important is "Indexing issues".