New bike, rear shock losing pressure

Got a new bike, have been pumping the rear shock to the psi for riding weight etc. Feels pretty good for the ride, which are no more than a hour or so... with plenty of breaks!! 🤣🤣 A couple days later the pressure has been dropping considerably.

Best way to deal with this? Any help appreciated

Edit for bike and shock: Scott Genius 940 X-Fusion Nude 5 shock.