This would be considered a breaking change mainly because an app may quite drastically change it's visual appearance with this change - to many in unexpected way, however it's a welcome change but it would be considered a breaking change and would need to go into a minor release likely (vs a patch).

Possible to post a quick screenshot of iOS/Android side by side on this?

@NathanWalker sure thing. Take a look at the red box shadow at the bottom.

This is how it looks on Android:

This is how it looks on an iPhone 15 after the changes:

This is how it currently looks on an iPhone 15 in production:

It's worth considering whether we should value native look-and-feel over cross-platform consistency or not.
Because in iOS, we have actual support for a complete shadow styling while android merely offers elevation and blur filter (with the exception of canvas shadow layer).

If we had to do such a calibration, I think android should match the iOS look 'n feel and not vice-versa.

@SeanKelly369 I noticed some designers divide blur by screen scale.
I found a Sketch vs iOS shadow discussion here: https://stackoverflow.com/questions/34269399/how-to-control-shadow-spread-and-blur
Can you check if dividing blur gives you the ideal result?