First of all that’s the Health App, not the Fitness App.
I can no longer see that prompt on mine (I probably dismissed it with the top right X a long time ago), but keep in mind you can change the move goals at any time, so I don’t see this as being indicative of a problem.
EDIT: I realised that this is the iOS18 sub forum and I don’t have iOS18, but the substance doesn’t change.
Move goals can be re-configured at any time.