The indigenous people of Australia were only considered part of Australian society (e.g. counted in the census) in 1967. As a New Zealander visiting Australia the casual racism of white Australians is mind blowing. New Zealand is not free from racism, far from it. Australia is next level
It will take a few generations for Australians to come to terms with living on stolen land, and to adjust to being colonisers. (White New Zelanders, Pākehā have been doing this for over thirty years, it is a process)
It is odd to put that declaration on a web page, how a digital asset is comparable to standing on land is clearly something the Australians are working on. Good luck to them, move on and let it be.
Edit: I'd agree though that NZ has a more mature perspective, stronger Maori population and that the condescension is probably fair.
I think it makes sense to put it on the website if you're going to do it though, since it's a website about, basically, a building in melbourne.
Land acknowledgements are the ultimate in virtue signaling; once they actually mean something, they suddenly end. Two overlapping tribal claims in New Brunswick cover 100% of the province. Thus, New Brunswick provincial employees ordered to not make land acknowledgements while working, because of legal case <https://www.cbc.ca/news/canada/new-brunswick/first-nations-n...>.
I think you need to rethink what you expect!