Where are the iMovie projects on iCloud backups?

Unfortunately the only 2 backups that I found (using the initialised temporary iPhone 11) were too recent (made after the update to ios 15.0). No videos in iMovie. I’m not happy because I have (pay) 200 GB of space on iCloud and only 70 were used, so plenty of space for other backups.

I could find my old iPhone 7+ that I never initialised and opening iMovie I could find some of the older videos (not the recent ones) and restore them. Yesterday I received my new iPhone 13 Pro and I will transfer all the data and files to it (from the iPhone XS Max).

The question is closed. Thanks.

Yes, all was enabled (I have 200 GB on iCloud) but unfortunately my temporary iPhone 11 (borrowed) was only 64 GB (mine is 256 GB) and after I used the backup for the temporary iPhone, I tried to open iMovie and was said it wasn’t possible because there wasn’t enough space (63.7GB of 64 GB occupied). I was also forced to update the ios to 15.0. Then my iPhone XS Max was repaired and I decided to use the transfer data instead of the backup (my last backup which certainly contained all the iMovie data was done with ios 14.x).

Now I could try to use this last backup for the repaired iPhone XS Max, but I should before initialise it and then search for available backups. But I don’t think that I can find backups made with ios 14.x! Only those done with ios 15, I’m right?