Unfortunately, we do not have any experience with this product. However, we recommend that you ask such a question as a discussion, as experience has shown that more customers respond there than to a single question. https://www.digitec.ch/de/community/brand/forum-9062

No, according to the manufacturer, the product is only compatible with the Surface Pro 9, Surface Pro 8 and Surface Pro X.

Exactly, this keyboard should work with Microsoft Surface Pro 8 without any problems. As far as I know, all Surface Pro models should have a 13" display.