I totted up this list and it looks like you are doing over 2,000 reps a day! Not even an Olympic athlete would do that much! But let me give an opinion on each of these considering you are only 7 weeks out.
walking
45 minutes -
that's actually far too much. Read this article Activity progression for TKRs
Heel slides 4 sets x10-30 -
these are largely unnecessary, specially at 7 weeks and that number is outrageous. No wonder you have pain! Read this article Heel slides and how to do them properly
Sitting knee bend 4 sets x10-30 -
same as above
Standing knee bends 4 sets x10-30 -
same as above
Mini knee bends 4 sets x10-30 -
same as above
Knee bending with band 4 sets x10-30 -
same as above but NEVER use straps, bands or weights
Lying on stomach knee bend 4 sets x10-30 -
same as above
Lying on stomach knee stretch 4 sets x10-30 -
same as above
Straitening knee with band 4 sets x10-30 -
same as above
Split squat lunge 4 sets x10-30 -
same as above
Step up step down 4 sets x10-30 -
same as above
Simple thigh squeeze 4 sets x10-30 -
irrelevant for knee
Thigh lift 4 sets x10-30 -
I'm assuming you mean a straight leg lift. Well once you can do these, you no longer need to do them!
Standing knee lift 4 sets x10-30 -
same as above
Harder thigh squeezes 4 sets x10-30 -
irrelevant for knee
Sitting knee straitening 4 sets x10-30 -
this is also called extension but I wouldn't recommend them as most 'extension' exercises only cause more swelling and this block the ROM
Knee straitening with band 4 sets x10-30 -
same as above but NEVER use straps, bands or weights
Sitting knee stretch 4 sets x10-30 -
irrelevant
Calf stretch 4 sets
x10-30 -
the only one I'd say yes to but cut the number to about 3 reps x 4 times a day.
Where I have just said 'irrelevant' I mean that those exercises are only likely to cause more pain, swelling and similar issues. They definitely don't help the knee to heal! That's because it's not the exercising that gets you your ROM, it's time. Time to recover, time for swelling and pain to settle and time to heal. One thing that seems to be missing from all the PT's protocols is that all your ROM is there right from the start, just waiting for all that to happen so it can show itself. In the general run of things, it doesn't need to be fought for, worked hard for or worried about. It will happen. Exercise as in strength training is counter-productive and in the early weeks does more harm than good. Normal activity is the key to success.
There are many members on this forum (including me!) who have done their recoveries but with NO exercises whatsoever! It's a fact that has been proven over and over again here, that while PTs might tell you that you have to 'work hard' and have a 'no pain, no gain' approach, neither of these is true. In fact, they are positively harmful!
Needless to say after all these I’m tired and very sore!
I am not in the least surprised! My only amazement is that you can still walk at all!
I'd really like to offer you some more structured advice but in order to do that, I also need to ask you a few more questions. Are you willing for me to do that?