You can add a form using a forms module.
1. Go to the page you want to add the form to.
2. Click page builder 2.0 at the very top of the page to activate the page builder.
3. At the top left you’ll see a +. Click that and a tab will open showing all sorts of things you can add to the page.
4. Look for “Forms”. Click and drag it onto the page (click and hold your mouse button down to drag it. Release your mouse button to drop it.) as you move it around the page you’ll see a blue box that shows where the text will be placed if dropped at that time. When that blue box is where you want it release your mouse button to drop it.
The settings will open for the forms module. Select the form you want at the top.
When you’re done save then at the top right click done then publish.