Is my ex-GF sending a message or is she really over me?

I dated my ex-GF for a year and half. We lived together for a year of that. Our relationship and love was genuine, and we did a lot of stuff together. Two days away from moving into a new house together, we got into a big fight and abruptly broke up. Now it’s been almost 3 weeks of no-contact. She had me blocked on everything for about a week and a half and then unblocked me on everything. Then she created a fake Instagram account and watches all of my stories (I confirmed the account was her). She watches them fairly soon after I post them so she’s either looking at my profile a lot or she has my post notifications on. I still have her on Pinterest and she’s been saving loads of breakup and “moving on posts”. The pictures of us together are still on her Facebook and she’s still friends with my friends & family but today she changed her profile picture to a selfie saying “Throwback to when I was feeling for myself”. I don’t know if all of these things are genuinely her moving on and being over me or if she’s just coping and making it appear that way. If she’s over me, why would she stalk my instagram?

Is my ex-GF sending a message or is she really over me?
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