130 to 135 Flexion is what I am going for for full Flexion.
My 2nd knee surgery was a few days after yours. That is a decent number to shoot for. I am at 135 for my 1st knee (done 6 months ago). My suggestion is to not worry about bending until you are about 5 weeks or so out. You've already got the leg straight (which I struggle with). Once the knee is healed more, then it becomes easier to work on bend. I am not sure about how flexible you were before surgery, but I can give you a tip on getting bend (once you are further along...do NOT do this now). Once you can control your leg well (can lift easily, no weakness when you walk, can control bending), and if you have enough hip flexibility, then you can try the following (I would not do this before you are at least 5 weeks out, and check with your PT beforehand):
Lay down on the bed.
Lift your leg till it is pointing at the ceiling.
Gently and slowly bend the leg at the knee, lowering your foot towards your butt.
Relax and leg gravity pull your foot down, increasing the bend.
Only hold for a few seconds in the bent position. You should feel tension, but not pain.
If it hurts, raise your foot so that the leg is straight and pointing toward the ceiling again.
Repeat maybe 5 times.
You can do this on and off while watching TV throughout the day. I hated the strap pull, so I invented my own exercise to get bend. I gained 5 degrees per week by doing this. I was doing PT 2 to 3 times per week, and this was the bending exercise I did at home (after at least 5 weeks post op--reminder, do not do this in the early stages of healing, and check with your PT to get clearance to do this). However, as my PT likes to point out, I was able to touch my toes before the knee surgery, and I am more flexible than most. Remember, that you will get bend faster after the first month-- so don't worry about it too much right now. Swelling interferes a lot the first month. And you have more time to get bend, so it isn't a race.
I had more bend before surgery, by my surgeon showed me why too much bend was bad for the artificial knee, so I stopped trying to go past 135. I believe anything over 120 is considered good.