You mean opening a bank account personally or for the company? Because for the company I'd simply use Wise or Mercury and be done with it.
I think getting a German bank to open a business account for a U.S. startup would be a nightmare at best.
which would be a local company registered in the Netherlands?
Wise has been great for managing my personal payments, but I still have personal bank accounts in a couple of countries where I hold property because it just makes things easier there.
That only counts for companies with operations in the US. My wife is a US citizen, and my bank - a medium-sized Danish bank - did not care, because they don't operate any business in the US, so they do not need to provide any paperwork for her to US authorities.
Because of the US FATCA law you may have trouble opening a bank account in some countries (smaller entities simply can’t be bothered with the paperwork the US demands on accounts for “US Persons”, a term which has specific meaning). In practice this just means you have to deal with larger banks.
Note I’ve been a US resident for decades, and started several companies here, but am not a US citizen and have lived and worked on three other continents as well so had no prior bias.
* Note 2: this business is intended to be quite profitable relatively soon, rather than a “focus on user growth and toggle the profit switch later business.