Hi
First of all, 3 weeks is still in the no-speak phase of Yeson - you should rest your voice a bit more. Yeson recommends 4 weeks of total voice rest and then another 4 weeks of limited use. Within the first 4-6 weeks the tissue is often swollen and thus the pitch is lower, that is why Dr Kim provides those neat graphs showing pitch increase taking some time after surgery.
In any case - what are you comparing - you need to compare your pre transition voice with now, not your trained feminized voice pre-op with now, as those are different things. Many patients sound similar to their pre op trained feminized voice after the surgery, but with some changes in the way it sounds and most of all without putting any effort into it or straining the voice to do this.
Maybe if you have recordings of your pre-transition voice, your pre-op feminized voice and your voice now, we can check it and give an opinion, but as I said, be careful and rather do only speak normally after at least 4 week post OP - I took actually 5 weeks to just be sure.