No - Lightning is a purely digital interface, see https://de.m.wikipedia.org/wiki...).
This means that there are only digital signals on the Lightning side, no matter what the accessory is.
Somehow Apple must have managed to accommodate not only the Lightning ID chip but also a digital-to-analogue (D/A) converter. Quite amazing.

Yes, but only from third parties

I would also be interested in this. Is there a solution to use the new Lightning headphones on a 3.5mm connector? As already mentioned, this would be exactly the opposite of this adapter.

Write Digitec an email with your question, they know their product range very well and can help you.
Here you should only ask questions about the product in question.

Turn over the cable - Done.
Or your question is not clear enough.