Hello, there have been some similar topics with findings for rain in the cockpit in VR.
You may wish to feedback on the following topic:
https://forums.flightsimulator.com/t/rain-icing-inside-cockpit-in-vr-right-eye-only/472210
There was also a discussion here:
https://forums.flightsimulator.com/t/rain-leaking-into-cockpit/474616
Closing this as some topics exist covering similar and it’s best to keep the discussion together. If I misunderstood anything, please let me know.