Dylan Pietsch has been left out of the Wallabies Test match against Georgia after sitting on the bench in his second outing for Australia.

The 26-year-old is a victim of the search for more depth in Australia's talent pools where new coach Joe Schmidt made an astonishing 17 changes to his Wallabies selected side of the 23 picked on Saturday for Sydney.

Only six of last week's starting team against Wales were also named in the same spot.

Schmidt hinted after the Wallabies' 2-0 clean-sweep that all players understand they need to have a "squad mentality" after the coach previously made five changes the week before between the Tests against the touring Welsh.

"I think we're trying to build a real squad mentality and have confidence in players across the board," Schmidt said.

"One of the things I would say … is the guys who weren't selected are a massive part of the preparation of this team that go on and the subs that come on later in the game.

"They need to understand that's really important for us, and then you earn opportunities on the back of that."

The axing may appear remarkably unlucky for the Wiradjuri man, who while he remains in the larger Test training squad of 34 players, was given less than five minutes on the pitch over a two-Test series to prove his worth.

Pietsch was the only one of the eight reserves last week that was not called into play for the Wallabies' 36-28 win in Melbourne.

After debuting in the opening Test of the season briefly in front of his Sydney home crowd, Pietsch waited the entire 80 minutes a week later, only not to appear in the specially-designed Indigenous jersey during NAIDOC week.

The absence was not quite a Jemma Mi Mi moment – the former Queensland Firebirds netballer, whose similar lack of game presence in a First Nations round enraged supporters across Australia – as the sole Indigenous team member picked in the occasion only to remain on the sidelines.

But, after playing less than five minutes in a long-awaited debut, Pietsch walks away from the preliminary Tests ahead of The Rugby Championship series against South Africa, Argentina and New Zealand having played one official Test, rather than two.

The omission after working the past 12 months in and around the Test squad across a 10-Test match span for just the one appearance while being initially called into Australia's World Cup squad late before, hours later, a change of mind from coach Eddie Jones, could test Pietsch's resolve and confidence.

Pietsch spoke out on the record just a week before the Melbourne Test after indicating late last year that Jones had "ghosted" him after packing his bags and Jones declining to elaborate on reasons behind not returning a call.

"He hasn't spoken to me – I think he's a bit busy," Pietsch first told National Indigenous Times in September while waiting in limbo for confirmation on specific details from Jones.

Pietsch has expanded after Jones was out of Rugby Australia's picture.

"If anyone got injured, they'd call us in …but the boys got injured, but they didn't call us in," Pietsch told Nine.

"Well, no, I got called in. I did get called in, but then they just kind of ghosted me."

Jones allegedly had struck a secret deal with Japan while still coaching the Wallabies at the World Cup.

Pietsch has since shown he has the character that will stand up strong against selection adversity.

"Especially when I got called into the World Cup and then uncalled from the World Cup for no reason at all," he said.

"That was hard, but like life comes and goes, it's how you respond to things. I just thought 'just another thing that I can learn from'."