The reason that BIPOC-exclusive presentation terms are coined is because BIPOC are excluded from terms such as femme, bear, otter, and the like because of being people of colour.
I, as an Indigenous man, cannot wear long hair (which is masculine in my culture) and call myself a butch without being told that my hair is too long for me to be a butch, due to the colonial gender binary that is put onto me. Black twinks are told that their skin is too dark for them to really be twinks, and Black femmes have their femininity denied to them for being Black. East Asian men are constantly put into the box of twink for being East Asian thus assumed to be feminine based on, again, the colonial gender binary.
This is why people coin BIPOC-exclusive presentation terms.
A presentation term coined to be exclusive to Germans, which I have seen at least three flags for, has nothing to do with this. I genuinely cannot see a reason why one would do this except to feel included as a white person.