Extremely anecdotal but in Australia we are seeing people from the retail sector looking at farm work, often the domain of backpackers who are now.not traveling.
It is a rebalancing so will likely come with some issues but if cafes/stores etc remain closed perhaps we will likely see these workers head to farms and balance the issue.
I'm not sure this will happen as the state borders are being closed and governments are strongly advising people to stay put. Also the federal government is looking at an 80% of wage scheme similar to the UK which must reduce the pressure to move just to cover living expenses.
It is a rebalancing so will likely come with some issues but if cafes/stores etc remain closed perhaps we will likely see these workers head to farms and balance the issue.