How long does the effect of domestic filler for under-eye hollows usually last?

I thought I just had severe dark circles, but it turned out my complexion looked dull because the skin under my eyes was sunken and casting shadows. I am currently gathering information from various sources because I am planning to get under-eye filler to flatten out the sunken areas. Considering the cost, I am looking into affordable domestic products.

I am posting this question because I am curious about the approximate lifespan of fillers when using a domestic brand. I would like to hear firsthand accounts from those with actual experience regarding whether the filler absorbs quickly and sinks back to its original state in less than six months, or if it tends to maintain its shape well for about a year without any issues. Since I am making a big decision to get the injection, I want to understand how long the filler lasts beforehand so I can plan my schedule accordingly. I would really appreciate a kind response.