Hi tonks, have you considered applying for jobs in Australia while you are overseas? Your husband probably has a better chance of securing a job offer from an Australian employer since his occupation is on the PMSOL, and he will be eligible for a travel exemption on the basis of being sponsored by an employer on the PMSOL. Check out this page on the Department of Home Affairs website for more information: https://covid19.homeaffairs.gov.au/travel-restrictions#toc-3
DHA specifically states:
"The Commissioner of the Australian Border Force and decision makers may grant you an individual exemption if you are:
a foreign national sponsored by your employer to work in Australia in an occupation on the Priority Migration Skilled Occupation List (PMSOL)"
Of course the 190/491 visas are still an option later down the track (particularly if you are already living in Australia). It doesn't hurt to get a head start on your Australian migration plans. Might as well start job hunting while waiting for things to go back to normal!
All the best
PS. Also I would consider applying for jobs everywhere in Australia, if only to secure a sponsorship, just to get a foot in the door so to speak. Once you and your husband are physically in Australia you can always change employers, move around, etc.