It's ment to have some resistance. So you can open the phone at different angles for flex mode etc
It's not a one handed opening phone like you can with the Z Flip
If you are concerned, try going into a store that has some on display to see. As it's difficult to advise without knowing how stiff to open yours is.
They may get very slightly less stiff over time, but having had a few Fold phones now. My Fold 5 is the same as the other Folds I've had