How to see external contract methods without Remix

Remix shows the external methods of contracts:
https://images.app.goo.gl/ASLzP1yKTqLSPAx46

I there another way with Truffle or Hardhat to see the external methods of contracts.

My particular use case would be: Finding out methods that should not be exposed (probably should be set to internal).

Maybe you can have a look at this tool:

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Very nice tools, thanks