@Robin4
Sorry to hear of your guests predicaments.
Please be mindful that there's provision under laws to return to one's state / home that come under international Human Rights.
We had huge issues here in New Zealand with people stuck in Quarantine hotels/ motels not able to see their loved ones before dying or attending their funerals that was legally challenged with a Judicial Review which comes under "Compassionate" circumstances.
The Courts ruled twice against the Director General of Health, and put some into line as the Public Health Act restricting people is for an Infected person not those who are not infected.
Look up Tony Christianson & Graeme (?)Hattie Judicial Reviews through Google NZ to understand the angle to approach it as it's pretty much the same laws internationally.
You may have also read my post about the Andrew Borrowdale JR that the New Zealand Law Society are also involved in - the submission papers are on the Law Society website & worth while reading to help understand our legal rights & the legal fraternities concern about the blanket approach that's been taken & if the Director General of Health has the powers to act in the manner he has.
There's also a JR that ruled in favour of the people in Pretoria, South Africa about freedom of movement.
Check if there's any Coronavirus / Covid19 Judicial Reviews currently in the Courts or previously been heard in Australia using Google & Australian Legal Institute databases.
We all still have our legal rights.
Hope this reaches you, Addie & family including your ABB families well
All the best from across the blue seas & skies in Auckland, New Zealand