You should contact them regarding what they deem as acceptable.
I contacted Martin Pulli (the AD for Habring2) in January of 2023. Here's the edited exchange ➤
Me: I see that you are the USA representative for Habring2. Do you know if they make, or can make, a central minute chronograph with adequate water resistance for surface swimming?
Him: No.
The Chronographs we make/offer presently are not designed for swimming or submersion.