Micah was named in Australia's 26-player squad last week, alongside fellow goalkeepers Mackenzie Arnold and the uncapped Jada Whyman.
But the 28-year-old had to withdraw just days later due to the lingering effects she was still feeling from a head knock she copped at training more than a month ago at club side Lyon.
Lincoln was named as Micah's replacement on Saturday - and the moment was bitter-sweet for the 21-year-old.
"My first reaction was just devastated for Teags, because I know this tournament would have meant a lot to her," Lincoln said.
"I send her all the well wishes in the world, and I really hope she's on the mend and can have a speedy recovery.
"I was super surprised and feeling super honoured after being called up. I just really want to go there and try and help the group as much as possible. It will be an amazing opportunity.
"I'm devastated for Teags, but hoping that I can help try and fill her shoes, which will be very difficult to do because she's an incredible player and person, and she will be missed."
Australia's Asian Cup starts next Sunday evening against the Philippines at Optus Stadium in Perth.
Arnold is set to be Australia's No.1 goalkeeper for the tournament, with Lincoln and Whyman to battle it out for the understudy position.
Lincoln has won just three caps since making her debut in December, 2024, and she warmed up for the Asian Cup by producing a series of stunning saves in Brisbane's 2-0 loss to Adelaide on Sunday.
But she was left to rue a moment late in the match when she failed to keep out a header from Adelaide's Ella Tonkin.
Lincoln had the far post well covered, but with her vision blocked by players in front of her, Tonkin's header still managed to sneak through.
"I just lost vision of it, a few people in front of me," Lincoln told Paramount.
"I'll try to be better and learn from it next time.
"It's always disappointing to concede. I'm looking forward to reflecting on that one and seeing what I can do differently."
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