Hello @phil-g
Thanks for bringing your question to the forums, it looks like you are visiting as a new member to the 3DS Max forum. I want to extend a warm welcome to the Autodesk Community!
In regards to your issue, I have a few questions for you. If you open up your dope sheet (right next to where you open the curve editor, do you still not see your assets list on the left side of the editor?
At first glance, it looks like the object you are currently animating is super far away from world space 0, it could be that your other objects are closer to the origin of your scene, so I would suggest scrolling up, to see the rest of your objects keyframes.
How many frames of animation do you expect to see? It looks like currently the object you have selected has about 800 frames so far.
I'm not sure why you aren't able to see anything on the left side of your curve editor, mine looks like this.

It could be that your UI needs a reset, here is an article on how to reset your user profile back to default. Keep in mind this wipes out your plugins, so you will have to re-link them to Max after you reset your profile. I hope this helps you out! Keep me updated, if none of this helps we can continue troubleshooting 😄
Talk to you soon!
Please select the Accept as Solution button if my post solves your issue or answers your question.