Is this the second round for you down there?
What you describe is exactly what late March 2020 through about June 2020 was here. The MUP was full of noob cyclists, runners, walkers and dog walkers and a few joggers that always confuse me because they take such fast steps and only move half the length of their foot further along.
With COVID ramping up again here, I wonder if we'll go through the same again. Though the roads here I really like to ride don't have much motor vehicle traffic anyhow.