I think the 2022 FSM is a little more updated. The difference between the 5L and the 6L would be if the transmission was overhauled or if its just a drain/refill. If you added 6L at this step and the transmission was not overhauled I think its fine, there would just be more fluid draining out when you pull the leveling plug. Also if it was overhauled it still might be low when you pull the leveling plug so they have you add .25L at a time until it flows down the case correctly.
From the 2022 FSM:
1. Transmission overhaul (includes main control and torque converter drain)
Volume
: 6.34 qt (6 L)
2. Main control overhaul or replace (with out transmission overhaul)
Volume
: 5.28 qt (5 L)
So for the fill I put in 5L, got TFT up to 185 on jack stands, then pulled the leveling plug. The fluid looked like this:
I let it drain right until it looked like this and then I installed the leveling plug:
Then I buttoned everything back up and put in another 1L of fluid in as both the 2019 and 2022 FSM say to do. If you did not add that 1L, yours is underfilled.
I put about 5K miles on the car since this flush and it shifts great. No weird shifts on the highway, no hunting for gears. It changes gears as it should. I also have Livernois updated tune but the tranny feels pretty good.