Just bought esrbuds for se 2020 why don’t they work?

What special earbuds?

What happens when you try to use them?

Do they pair with your iPhone?

If there is an error message, what is the exact

complete text of that error message?

You need to provide more information before someone may offer a solution.

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Writing an effective Apple Support Communities question:

https://discussions.apple.com/docs/DOC-5931

Is English not your first language? If not you might try using your primary language.

If you are referring to AirPods (I don't know of an "youse" IEM company) then yes it may have downloaded a firmware update and it will display a popup on the screen to connect them. But it won't download Bluetooth.

You do know there is more than one brand of earbuds and that some are wired? And no, Bluetooth headphones don't require a special Bluetooth software to be downloaded to use them with an iPhone.