You are thinking of the Soyuz or Brotherhood pipelines, which go via Ukraine (and there is a third option: the yamal pipeline that goes via Poland). NS1 and NS2

You are thinking of the Soyuz or Brotherhood pipelines, which go via Ukraine (and there is a third option: the yamal pipeline that goes via Poland). NS1 and NS2 go directly from Russia to Germany via the baltic sea, which Ukraine has no direct border with, so are nowhere close to any war zone. The compressor station, which allegedly had technical issues, is located in mainland Russia (far far away from Ukraine).