They will most likely utilise some sort of system where a photo or short video are uploaded and an AI will make a determination of age. It’s not going to be accurate but will probably be compliant enough.
> Specifies that no Australian will be compelled to use government identification (including Digital ID) to prove their age online, and platforms must offer reasonable alternatives to users,
> Establishes robust privacy protections, placing limitations on the use of information collected by platforms for the purposes of satisfying the minimum age obligation, and requiring the destruction of information following its use
https://www.infrastructure.gov.au/sites/default/files/docume...