The product description of the product does not list the 9s.
That's why I had a quick look at the manufacturer's website. It is not listed there either.
(Source: https://gopro.com/de...)
The remote control for the GoPro 9 Black will not be on the market until the end of August (sales start: 31.08.).
Product here: GoPro Smart Remote (Remote Control, MAX, Hero 8, Hero 9)
Source manufacturer here: https://gopro.com/de...

Funnily enough, the product is already available at Brack, for example. I don't know why.