I'm not sure if anyone can answer that - I certainly can't. But I trust that the SFs are mostly made in Germany, and I suspect a good portion of the parts (Schott glass, body, focuser probably) will be German made. But the exact details don't matter, too much. What really matters if if you still trust Zeiss to deliver a high quality product at a fair price. If they determine that they can make a better product by outsourcing some parts, that is ok with me. If they determine that they can make just as good a product if they outsource some parts, that's still fine. And it doesn't matter if the outsourced parts are German, Japanese, Chinese, or Congolese to me (aside from any human rights issues). A manufacturer can just as well fight too hard to keep everything in house and end up making a product that is too expensive to sell, or miss out on better parts due to their lack of in house ability. And if the quality of someone's product slips, it doesn't matter too much where it was made.
I do agree with you that labelling the Trinovids and Conquests as "Made in Germany / Portugal" is misleading.
For a long time you only had to do "final assembly" in the US to label something "made in the USA" and I recall from the 80's or perhaps early 90's a bunch of news stories of finished goods being imported (garments, tools, etc) and a tag being sewn in or a handle being screwed on or something to qualify as "made in USA." Now there are "made in USA" requirements that something be made in the USA from all or nearly all US sourced components. But there are "built in USA" and "assembled in USA" and other labels and I get gray on what the details are.
The US is full of products that are labelled "0 grams sugar*" and "0 grams trans fats*" and when you look at the * it is per serving, and the products frequently contain just under 1/2 gram of sugar or trans fats per serving, in order to be rounded down to 0.
This discussion reminds me of this cartoon:
https://imgs.xkcd.com/comics/free.png