The long-time champion of veterans' issues attended a Welcome to Country and smoking ceremony outside the Australian War Memorial in Canberra on Wednesday afternoon.
About 100 members of the public greeted the duke and watched on as he laid a wreath in front of the For Our Country sculpture on the site's lush western lawns.
Harry walked through the sculpture, a long passageway behind a reflective facade adorned with thousands of small circular mirrors, before being escorted into the memorial proper.
Earlier in the day, the second of the four-day tour, the prince was the guest of honour at a Movember event in Melbourne at the home of the Western Bulldogs AFL team.
Opening up about becoming a dad, Harry told the forum of his feelings of "disconnection" as his wife "was the one creating life and I was there to witness it".
''And I think for many guys, you try to think about what service can I provide at this point, because my work here is done to some extent," he said.
Dad to Prince Archie, six, and four-year-old Princess Lilibet, Harry said he saw his role as fostering the next generation, but he steered clear of making direct references to his own father, King Charles, from whom he is estranged.
''I see parenting evolving over time. I think it always has, just as much as from my perspective, our kids are our upgrade,'' he said.
''That's not how I was taught but that was my take on it."
After a Q&A session, Harry joined the players on the field for a chat and kick of the footy.
Outside, crowds clamoured for a glimpse of prince, including parents who watched on after dropping their children off at the childcare centre next door.
Diehard Bulldogs supporter Rose Dennis doesn't consider herself a royal enthusiast, but she was delighted it was her club the prince chose to visit.
''I was coming here for training anyway so having Harry here is an extra bonus," she told AAP.
She pushed back against critics of the duke and duchess, who have accused them of using the quasi-royal tour as a money-making exercise, saying the pair were using their profiles for the right reasons.
Still, Bulldogs fans who arrived in the morning to catch their team practice were left annoyed when they missed the session due to being locked out during Harry's visit.
The duchess's plans for the day have not been made public, although the pair will be reunited when Harry jets back to Melbourne later on Wednesday.
The visit could be mistaken for an official tour, although the pair are no longer working royals and are visiting in a private capacity.
It marks their first trip to Australia since 2018, when they spent nine days travelling in the country.
Excited crowds gathered to greet the pair on Tuesday, meeting families and youngsters packed inside the foyer at Melbourne's Royal Children's Hospital.
On Thursday, Harry will join Meghan for the Scar Tree Walk, a cultural journey connecting traditional and contemporary Aboriginal cultures in East Melbourne.
Harry is then due to deliver a keynote speech at the InterEdge Psychosocial Safety Summit in Melbourne, tickets for which range from about $1000 to $2400.
The pair will fly to Sydney later on Thursday, where Meghan will headline an exclusive three-day women's retreat pitched as a "girls weekend like no other" with tickets starting at $2699.
The duke and duchess will end their trip in Sydney, where they will sail around the harbour and attend a rugby match.
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