I uploaded my pdf form and my chart is not showing up

When I click preview form I don’t see the spreadsheet I created on the form

Hello! Please note that the Spreadsheet widget which you're using can't be mapped to the PDF. You'll need to use Input Table field for this purpose. Please have a look at the following screencast that demonstrates how this can be done:

I hope this helps. For further queries, feel free to write back to us.