If you have a backup archive of your website on your local device, you can upload it to your cPanel hosting by logging into your cPanel and selecting Files → File Manager:

Next, click on Upload at the top-right corner of the File Manager window:

Drag and drop your file, or click on Select File to choose the file you would like to upload:

To replace current files of the same name in your hosting with the upload, check the box to overwrite any existing files.

Once the file has been successfully uploaded, right-click on it and select Extract:

Then, select the path where to extract the files. For example, if it's a backup of your website files, select the public_html directory, and click Extract file(s):

After a few minutes, your files will be extracted to the selected location.

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