If the projects did not transfer during the native Apple device transfer, you can move projects manually, as follows:
On one device
1. Tap the (...) button > Select Projects > Select up to 10 projects at a time
2. Tap the (...) button at the bottom > Export Projects > Save to Files
On other device
3. Tap the (...) button > Import Projects
4. Tap the (...) button > Select > Open.