I suspect it will be contract award for the RFP which went out in May.
https://www.metrolinx.com/en/news/rf...n-lrt-contract
They will then enter a development phase and construction will slowly ramp up.
This would be for the first of the two contracts too, the one which focuses on utility relocations, structures, etc.
The second contract, which hasn't been let out yet, will be for trains, tracks, etc.