According to the APTA statistics, Brampton Transit got 49,200,800 million boardings (unlinked trips). Brampton Transit had been incorrectly reporting revenue riders or linked trips, the Canadian method of counting ridership, to APTA for years. They say the 2021 ridership was 19,462,800 which I assume are linked trips, so probably around 28 million unlinked trips, or 75% growth in 2022 compared to 2021. Ridership in 2019 was 31.9 million linked trips, so approximately 46 million unlinked trips, so Brampton Transit ridership not only recovered from COVID in 2022 but even exceeded the pre-COVID ridership.
Compare this to TTC, where ridership in 2022 was still only 55% compared to 2019. GO is even worse, recovering only 44.4% in 2022. YRT recovered around 71%. I don't have 2022 numbers for Mississauga, but the ridership in 2023 so far is 110% compared to the same months in 2019, so I'm guessing the 2022 numbers probably were probably 90 to 100%.
I think you can see the trend away from downtown commuting. The systems serving downtown lost the most ridership and they are also the slowest to recover. Even York Region Transit is slow to recover being much more reliant on transfers to the TTC compared to Brampton and Mississauga which are more independent systems mostly serving factory and warehouse workers instead of office workers.
It might also be that the overall total yearly ridership hasn't recovered only because of lower weekday ridership. Maybe the weekend ridership is actually higher than before. Or maybe the weekday ridership down only during the peak hours, but higher in the off-peak hours. Hard to find the data, especially with the TTC website offline right now. Yeah, it's not going be easy to get all those riders back when you can't even keep your fucking website online.
Based on the APTA numbers, although the overall TTC ridership recovered to 55.3% in 2022 compared to 2019, the weekday ridership only recovered to 50.5%. You can also break TTC numbers down by mode, where bus ridership in 2022 was 69.9% of pre-COVID levels compared to subway ridership which was only 50.1%.
https://www.apta.com/wp-content/uploads/2020-Q4-Ridership-APTA.pdf
https://www.apta.com/wp-content/uploads/2022-Q4-Ridership-APTA.pdf