In Move some of the features are missing.

A couple months ago I updated to the Big Sur. Until recently I realised that some of the features in iMovie are missing such as...

All the transitions are gone and I can only use a transition when I select a theme which is what I don't want.

This is when I select a background (Im using cubes). This doesn't happen to all of them just most of them.

This is when I try to add text (I'm using scrolling credits) This doesn't happen to all of them just most of them.

I can't show a video of this but when I try to add a green screen and select the "green/blue screen" button in the drop-down menu.

I already tried...

• Deleting and re-installing
• Making a new library
• Giving it full disk access

Please help me as I need this ASAP for projects.

Im on MacOS 11.6