I have had jowls (or marionnette lines ?) as long as I can remember - what can I do?

Hello, I’m a 22-y.o girl who is concerned about her lower face area and how it is going to evolve with age. I started to notice the line at the corner of my mouth not long ago, but looking back at some of my childhood photos, I spotted the same lines. I always had a quite prominent jaw for a girl and I don’t have « bad » habits (smoking etc) other than having a bad posture that I’m trying to fix. My skin is however very dry. How can I attenuate those lines without using fillers ? Thank you