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Hi! You can connect your Ledger device to MetaMask with the Ledger Ethereum app, and then manage Ledger-protected assets on any network supported by MetaMask (Ethereum, BSC, Polygon, FTM, …).
Here are the instructions, please read them carefully: https://support.ledger.com/hc/en-us/articles/4404366864657-Set-up-and-use-MetaMask-to-access-your-Ledger-Ethereum-ETH-account?docs=true
*** Remember that it’s incredibly important that your recovery phrase is never entered into your computer or smartphone, ever. This also means that you shouldn’t be setting up your Ledger with a recovery phrase that came from these devices either! ***
Finally, don’t hesitate if you have more questions 😉