Powell made his test debut back in 2017 but has only played four matches since, and none against New Zealand, who Australia face on October 11.
“My first time in this set-up I was 22, so I was probably a bit quieter and not as confident around the group, I’d just listen a lot more,” Powell said on Friday.
“Having the opportunity at the Brumbies to be a part of the leadership group has helped me out a lot, and I’ve enjoyed it.”
Under former Wallabies coach Michael Cheika, Powell sat behind White and Wallabies centurion Will Genia, who is now playing in Japan.
But the signing of new coach Dave Rennie presented a clean slate.
He admitted he thought with White’s mid-season return to the Brumbies from Europe could dent his hopes with Rennie and he could again be left out in the cold.
“I thought I might have been playing around in club footy for the rest of the year, so it was definitely really exciting times to get the call up to the squad,” he said.
NZR insists the proposed Super Rugby schedule for the next two years will deliver the best possible outcome, despite the omission of a Pacific team for next year.https://t.co/rCGvCFHNEE
— RugbyPass (@RugbyPass) October 1, 2020
“I think with any new coach everyone’s trying to put their hand up and perform the best.
“I think the selections he’s already made in terms of the squad, there’s plenty of new faces so it is exciting, a refreshing time to see some new blood in the squad.”
Powell’s desire to play test football helped make his decision to leave Canberra after six years of Super Rugby and sign with Melbourne this week.
“Playing for the Wallabies a is a huge part of why want to stay in Australian rugby,” he said.
“I wanted to exhaust my options here before I looked overseas.
“I’m definitely happy that the Rebels are there to give me an opportunity to continue to play in Australia.”
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