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looks like you need to use webpack (or similar alternatives) to shrink your lambda / dependencies

Are there examples of this anywhere? I'm trying to wrap my head around the workflow here to find out what's even causing this.

Is there a hook I can print what's actually being sent to AWS in the "magic" callback functions?

I don't know if there's a way but what we do, our workflow is something like
yarn typecheck ; yarn test; yarn build (which does the webpack)

Then in the lambda definition in pulumi we pinpoint the folder that webpack outputs to

HTH I really need to find the time to blog some of my last 6 months learnings on pulumi there's not enogh online