Deleted disk
I deleted everything from my macbook and don’t know how to reinstall anything…. Please help if you can.
MacBook Air (2020 or later)
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It helps to have the exact model of your Mac since the instructions can vary a bit.
See this Apple article for using Internet Recovery Mode:
How to reinstall macOS - Apple Support
If you have an M1 Mac and you erased one of the critical necessary partitions, then you will need to use another Mac running macOS 10.15+ in order to "Restore" the firmware on M1 Mac:
Revive or restore a Mac with Apple silicon using Apple Configurator 2 - Apple Support