Per
ThatChecks :
The most recent to be selected for flow in February are at 6.5 years (late 2019 hires). All of them were pre-covid hires. There was no hiring between March 2020 and June 2021. When the last of the Pre-covid hires have flowed, the flow time will immediately drop to 5 years. For those hired in 2021 and after , they will see a 5 year flow.
That being said, it will only remain five years as long as there is no slow down in hiring.