Okay so I rewatched the Project Hail Mary clip where Grace first encounters the Blip A and I had an extremely funny realization.
When Rocky tosses the zenonite container with his message inside and Grace doesn't get it and it just bounces off the hull the speed at which Rocky gets the second container ready (it's literally seconds) and sends it flying over makes me think that no, he didn't think Grace was stupid for not catching the first container, and instead implies the much funnier idea that Rocky had at least two, probably three, canisters with tiny star-system maps inside them locked and ready to go because he had no idea what kind of alien race he was about to encounter either and he realized he might have to try sending the message more than once.
Like, the enthusiasm this little guy has at finally meeting another person after 46 years and his hopefulness that Grace will be friendly is unmatched, he was probably multitasking making the star-maps while chasing the Hail Mary around going "why alien spaceship not hold still question? Rocky want to make friends!".
