If VGW haven't announce the %, they will announce it around tax time which is end of June. ATO (Australian Tax Office) expects tax payers (resident or non resident) to lodge their tax returns and pay their tax after lodgement.
Dividends paid or credited to non-resident shareholders: https://www.ato.gov.au/Forms/You-and-your-shares-2020/?page=13#:~:text=If%20you%20are%20a%20non,tax%20offset%20for%20franked%20dividends.
Non payment may affect visa applications or citizenship application (character requirements): Consult with migration agent. If laws doesnt apply now, it doesnt mean doesnt apply later.
