There are several steps you can try if your Yahoo emails disappeared from inbox:
Check your internet connection: Make sure your device is connected to a stable internet connection.
Check the spam folder: Sometimes emails can be filtered into the spam folder by mistake.
Update browser: Ensure that you are using the latest version of your web browser.
Check your email filters: Make sure your email filters are not accidentally directing emails to another folder.
Check your storage limit: If you have reached your storage limit, you won't be able to receive new emails.
Clear browser cache and cookies: Clearing your browser cache and cookies can resolve many technical issues.
Try accessing your email from another device or browser: This can help determine if the issue is with your device or with your Yahoo Mail account.
If none of these steps resolve the issue, you may need to contact Yahoo support for further assistance.