Animated Objekts in sequencer rendering

Hi, I’m relatively new to UnrealEngine and have a (probably banal) problem - I’ve been looking for a solution on the net for two days, but haven’t found anything … I hope someone can help me:

First: I just want to render animations / movies through the sequencer (I don’t want to make an interactive game)

Then: I now have a scene with great content and an animated camera, then I gave a sphere a looped rotation (I tested different ways e.g. Blueprint, RotatingMovement) - but when I render my sequencer animation, the sphere does not rotate. (when I press the play button in the editor, the sphere rotates but not in the rendered sequence)

Oh, one more thing - I’d like to set the rotation speed via keyframes in the sequencer.

Is there a solution for this?
Thanks in advance