Don’t ask a question if you don’t want answers. 😬
Flaps help generate more lift. At a lower weight your flap speeds will also reduce. For a B747 below 25% weight I’d recommend getting below 200kts before selecting flaps 10°. It is common to get a slight bump in the nose when dropping flaps which you should combat with some nose down pressure.
Additionally, ensuring you’re at a proper speed for the different flap settings will significantly reduce that nose up tendency when selected.
If you want to see this in action, hop in the XCub and try putting in the first notch of flaps while above 70kts. Do the same when you’re around 60kts which is a more appropriate speed. You’ll see a big difference in aircraft characteristics purely by adjusting flaps at the correct speed.