Covid meant New Zealand, Australia and South Africa played their own competitions in 2020.
In 2021 New Zealand and Australia played in house tournaments followed by a cross-over series, while South African teams decided to head to the Northern Hemisphere and play in the United Rugby Championship.
Robertson said the New Zealand teams, and by extension the All Blacks, are worse off without South Africa in Super Rugby.
He believes the South African teams are missed.
"I think more and more now."