The build passes fine on my machine. I've tried clearing the nx cache locally and get the same 🤔.

Instead of attempting to bundle the private @sentry-internal/tracing code into @sentry/tracing and getting all the typescript definitions bundled too... how about making @sentry-internal/tracing public and publishing it. It would be a lot less work for what is only a stop-gap solution.

how about making @sentry-internal/tracing public and publishing it

let's just do this - we can leave a note in the readme that nobody should be installing this - and we don't have to publish it in the release registry.

Splitting into multiple PRs:

• feat(tracing): Add @sentry-internal/tracing package #7445
• feat(tracing): Move tracing code to internal package #7451