BUPA are still open to provide Medicals for those who need them for a Visa application in Australia. However, due to COVID-19, they are prioritising them according to need.
Their current wording is:
To request an appointment for a visa medical examination please complete the form below. At this stage we are prioritising appointments based on guidance from the Department of Home Affairs and will therefore contact you if your appointment has been deemed a priority type assessment.
Some Visa Applicants might find an Experienced Australian Migration Agent of great assistance.