Unfortunately muun won't work. It doesn't support lightning address. You can check

Alby — Bitcoin Lightning Wallets & Tools

Alby offers open-source wallets and tools for using Bitcoin as everyday money online, in apps, and in person. Try Alby Cloud or self-host Alby Hub.

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Stacker News

stacker news

moderating forums with money

and use that to get lightning address and then from there you can withdraw to Muun if you want...