Need to reactivate my apple ID associated with my Macbook Air M1

See -> Activation Lock for Mac -> Activation Lock for Mac - Apple Support

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Other ways to disable Activation Lock

• If you don't have access to your Mac or the settings above, use a web browser on another device to remove Activation Lock on the web.
• Activation Lock is disabled when you use the Erase All Content and Settings feature.

If your previously owned Mac shows an Activation Lock window that asks for someone else's Apple ID, the previous owner may need to remove Activation Lock for you.

You can also contact Apple support for help, -> Get Support (apple.com)

You have to show proof of ownership of your product, provide all documentation showing your purchase of the device.

If you do not have additional proof of ownership, contact the reseller. They may be able to provide the original purchase document.

Once Apple receive your proof of ownership, Apple will further review your request and provide an update.

See also -> Keep your receipt after you buy an Apple device

Keep your receipt after you buy an Apple device – Apple Support (UK)

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If your Apple ID says it's inactive you need to reach out for support from Apple directly ->  Get Support

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Note:

Never post your Apple ID on a public forum, that's asking for trouble.

Have asked the host to remove.

You need to reach out for support from Apple directly ->  Get Support

Or call Apple in your region see -> Contact Apple for support and service 

We can't help you, sorry, we are also users of Apple products & services like you. 

If your Apple ID says it's inactive you need to reach out for support from Apple directly ->  Get Support

You can try, but tell clearly which Apple ID is inactive.