@bopeep08 Welcome to HP Community!
I understand that the Wifi button is disappeared.
Do not worry. I will try to fix the issue.
Please perform the below steps and check for the issue.
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I have a few steps that will resolve your concern,
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Do a hard reset of the notebook to see if that gets the card to show up.
Click here for instructions.
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Reinstall the drivers from the HP website.
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If the issue persists, recover the original drivers from HP/Recovery manager.
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Initiate a system restore followed by a Recovery to resolve the issue.
Keep us posted,
If you would like to thank us for our efforts to help you,
Give us a virtual high-five by clicking the 'Thumbs Up' icon below, followed by clicking on the "Accept as solution" on this post,
Have a great day!