APO is just process lasso with tuned rulesets.
You can achieve similar boosts by setting R6 siege and metro exodus to have exclusive access to the P cores while relagating background tasks to the e cores.
Thats why only two games are supported right now, because it takes a lot of testing to make sure the game actually benefits from this kind of optimisation, cyberpunk 2077 for example will run worse if prioritised the same way due to it being optimised well to utilise the e cores for better fps.
The culprit is the 7945hx, due to it being chiplet, the iodie is basically a separate processor that can't be turned off.