Adobe Acrobat Pro DC - Missing tools?

Click on Tools - Prepare Form and then click on "More" at the right side of the window and then on "Revert to Acrobat Form", and then those tools will become available. In the future, don't tick the "This document requires signatures" box when creating the form, even if you want to add Digital Signature fields. That (very badly labeled) box converts the file to an Adobe Sign document, which has limited functionality.

This tool is not available in a Adobe Sign form.

Give this a try...

My guess is that your tool labels are taking up too much real estate, hiding some tools.  Right click on the Prepare Form toolbar and deselect Show All Labels.  I suspect that might show you more tools.

Let us know if that helps.

My best,

Dave