In a flyback transformer with multiple windings, how are voltages controlled for different current loads?

This is the flyback transformer I will be referring to: Wurth 760871543

There are three output windings as follows, 24 V at 0.30 A, 5 V at 1.15 A, 14 V (unspecified but in mA range aux winding).

The voltage which I need to control precisely is the 24 V winding using secondary side sensing.

Here is my question: If the output I am sensing has a very low current load (1 mA), but the 5 V winding has a very high current load (1 A), won't the voltage at the 5 V winding drop much faster than at the 24 V winding?

If this is correct, how would I then go about controlling all the voltages simultaneously?

For example, if I instead sense the 5 V output winding for feedback, would switching the flyback transformer more frequently (to compensate for the larger current load) cause the voltage at the 24 V output winding to increase more than the regular 24 V?

Just some additional background on my design... I am using a Power Integrations TinySwitch-4 switching controller. The 24 V will get increased to 1 kV through a converter and voltage multiplier. The 5 V will power a Raspberry Pi. The 14 V auxiliary winding will power the switching controller IC.