not familer with polyfill, but is it rightSymbol.asyncDispose without esnext.symbol.async-dispose ?

[HomyeeKing]

https://babeljs.io/repl#?browsers=&build=&builtIns=usage&corejs=3.21&spec=false&loose=false&code_lz=MoTwtgRg9gNgdAQwM4gHYGMAiBLJAHKJAUwCgg&debug=false&forceAllTransforms=false&modules=false&shippedProposals=false&circleciRepo=&evaluate=false&fileSize=false&timeTravel=false&sourceType=module&lineWrap=false&presets=env%2Creact%2Cstage-2&prettier=false&targets=&version=7.22.9&externalPlugins=&assumptions=%7B%7D

[JLHwung]

The ayncDispose is still a proposal, you will need to set proposals: true in babel-plugin-polyfill-corejs3 option:

https://github.com/babel/babel-polyfills/tree/main/packages/babel-plugin-polyfill-corejs3#proposals

Unfortunately the REPL does not support doing so yet.