Ontario has a critical care information system which is probably the source of this chart. This chart is consistent with the weekly death rate chart: https://www150.statcan.gc.ca/n1/pub/71-607-x/71-607-x2020017-eng.htm by which I mean: A measurable increase in death rate should show up as reduced ICU capacity.

Both charts lack long term time series, and lack population-adjusted statistics for meaningful comparison with other years.