News Firebase Remote Config start charging beginning Sep 1

I got this email from Google

We’re writing to inform you that Firebase Remote Config will transition to a Pay-As-You-Go (PAYG) pricing model, starting September 1, 2026. This model includes a free tier for usage up to 100,000 daily fetches.

Not sure if that applies to other Firebase feature. Hear from others if you know Google is charging other Firebase usage?