is it possible to create software that can predict an prng?

So you want to replicate the PRNG? Sure, as long as you know the exact state and input parameters. And its gubbins. Maybe just stick with password brute force software.

Dont we all mate. Mind you, they would never pay out because your suggestion is against the law and means they can tell you get lost.

Casinos have been dealing with people trying to beat or cheat the house every way they can think of for as long as there have been casinos. You’re not going to be able to.

Once upon a time I dreamt I could find the random seed to the universe. Therefore would be able to predict every lottery number.

I don't know about any specific online casinos but with python's random module you can set the seed produce a series of psudo random numbers then repeat the process with the same seed and observe the same numbers.