Inquiry regarding the effectiveness of fillers and Rejuran for improving neck wrinkles

The deep horizontal wrinkles on my neck are getting worse, so I am looking to get some treatment. I found that there are limits to improving deeply established horizontal neck wrinkles with home care alone. After searching online, I heard that many people these days are getting injectable treatments such as neck wrinkle fillers or Rejuran Healer.

I am concerned that injecting fillers into the neck might cause side effects, such as unevenness or visible indentations, because the skin is very thin and moves frequently. Which procedure is more effective: filling deep horizontal wrinkles with fillers or inducing skin regeneration using Rejuran? Alternatively, is a combination procedure using both fillers and Rejuran common? I would appreciate information on the actual duration of the results and the recovery period, including the time required for bruising and marks.