Hi Kristen.
With regard to your concern, Windows 10 is unavailable on your Lumia 630 as it needs certain requirements. As a workaround, you can use your browser to access that certain application\website. Feedback Hub is also an option by sending your comments and suggestions to help us make Windows better.
For your reference, please visit this link: Windows 10 Mobile Specifications & Systems Requirements.
Let us know if you need further assistance.