Harry and Meghan in Australia

The couple's first stop at the Royal Children's Hospital in Melbourne paid tribute to the late Princess Diana, drawing large crowds of well-wishers.

While advocates have praised their commitment to charitable causes, skeptics have questioned the mix of advocacy and commercial work during the trip.

Meghan is expected to hold meetings regarding the launch of her lifestyle brand, 'As Ever,' which has recently trademarked several products in Australia.

A petition calling for more transparency regarding the tour's policing costs has already garnered over 45,000 signatures.