Not sure what "sth" means, but the advantage is played from that foot so if AUS fouls afterwards, you don't go back to the PC. That gives AUS two bites at the cherry as they say.
Easily done, since VAR doesn’t exist in hockey. We have VR or VU, video referrals/reviews done by video umpires. Don’t apply terms from other sports that are associated with systems that don’t work: our sport deserves better. 😊