I can no longer find the resize project tool

The resize project tool has moved! You can now easily find it inside Pages, along with the ability to add Pages to your project:

1. Tap the pages icon at the top of the canvas in the middle

2. Tap the size indicator button in your Pages view at the top

3. Scroll through the preset size options at the bottom to find the one you need, or insert your unique dimensions by selecting "Custom"

✨ Important: Currently all the pages in your project need to be the same size, so the size you choose will be applied to all your pages.  

Find out more about the Pages feature here