Dissolved lip filler multiple times but hasn’t completely returned to natural size

Hi, I have had hyaluronidase to dissolve my lips 4-5 times now, and although my natural shape has returned, the size has not. More noticeably my top lip. Did having fillers induce collagen production thus increasing my lip size permanently? Or is the hyaluronidase not being injected/targeted properly? I had 2ml of fillers over the course of 2.5 years. Nothing drastic and never had any complications - filled with restylane, teosyal, and stylage. Please advise. Thank you.