Munster set up three tries in Australia's semi-final win over Samoa, while Reece Walsh scored three tries and received player of the match.
Some fans considered Munster the standout, with his running game a major feature of his performance.
Who kicks in the final remains uncertain as Walsh recovers from a groin injury, and Australia's earlier meeting with New Zealand ended 24-22.
Walsh took the first four goal attempts against the Cook Islands before hurting his groin, prompting Munster to take over; Mitchell Moses was injured and Latrell Mitchell was on the bench.
Munster made five of seven attempts against the Cook Islands and six of eight against Samoa, despite not kicking for Melbourne Storm.
"To be completely honest, I don't really like goalkicking," Munster said with a smile.
"I just do it because we've got no one in the squad doing it at the moment.
Reece is the number one kicker, so if he feels good enough to do it on Sunday, he'll take over.
If he pulls up a little bit lame on captain's run with his groins, I'll probably take over."
"When I am playing my best, it is when I'm running the ball. That's the mindset and the aim for myself on Sunday," Munster said.
"The game might not be the same against New Zealand. I'm sure they've got a plan around myself and I'm sure I'll have to try and figure out a way to get around it."