liquid and rock noise under the car

What is your question?

from a two-months old 2024 hybrid CR-V. In california so no rain at all. No A/C but only fan was on. Sounds like rocks and liquid flushing/breaking through/rushing through the bottom of my car as I was driving straight around 30mph. no leakage outside of body any suspicions of what it could be?

How long has your 2024 Honda CR-V had this problem?

A day