Make sure you're following all the below steps to add a form to a page::
1. Open the Toolbox. In the Forms section, select and drag the **Sitecore Form Wrapper** rendering to the relevant placeholder.

[![enter image description here][1]][1]

2. After that, drag an **Mvc Form** rendering to the Sitecore Forms Wrapper.

[![enter image description here][2]][2]

3. After dragging the **Mvc Form** onto the page, In the S*elect the Associated Content* dialog box, select the form that you want to display on the page and click OK. The form is now displayed on the page.

4. In the Experience Editor, click **Partial Design** and click **Metadata**. In the SXA Toolbox, in the Forms category, drag and drop the **Forms Scripts** component before the closing /body tag of the page.

[![enter image description here][3]][3]


  [1]: https://i.sstatic.net/I80Iq.png
  [2]: https://i.sstatic.net/H9wyo.png
  [3]: https://i.sstatic.net/2hdme.png