How effective is the double chin lifting?

I have gained a little weight recently, and my double chin is so stressful whenever I take photos, so I am looking into double chin lifting.
I'm particularly self-conscious about my side profile looking saggy, so I've been searching extensively for reviews on double chin lifting. I found that there are more types than I expected, and the price differences are significant.

There are so many devices like Shurink and Ondari Lifting, and there are also clinics that recommend thread lifting, so I don't know what to choose.
The place I consulted said that if you have a lot of fat on the chin, many people combine it with contouring injections to see a double chin lift effect. Is there actually a significant difference in satisfaction if I get them together?

I just want my jawline to be a bit more defined and my face to look less puffy.
I don't want it to be too obvious, so I'd prefer a look where the lines are naturally defined.

I'm also curious when the double chin lifting effect will start to show.
I’d like to hear your feedback on whether you feel the effects immediately or if they gradually improve over time.

It would be helpful if you could also let me know the degree of pain or swelling.
Please recommend any equipment or care tips that have been effective for double chin lifting.