Double chin after chin filler - is this a side effect or filler migration? (photos)

Hi, I’ve gone through chin filler one year back. I’ve always had a great jawline, getting chin filler was a misunderstanding, the idea was to reduce cheek volume instead practitioner added more volume to chin and Jaw to match cheeks. Now, I’ve a sudden double chin that I never had, my weight is under control. Could it be post side effect- migration of chin filler? Can Kybella resolve it ? Or HIFU ? Tried RF & Microneedling but no results. Attaching pictures pre(before filler) post(after 1 year)