How long did the filler actually last?

Lately, when I look in the mirror, I often feel that my face doesn't have the same volume as it used to.
My nasolabial folds and cheeks look a bit sunken, so even when I wear makeup, I don't look vibrant and end up looking tired. I've heard people around me suggest getting fillers a few times, so I've become interested.

However, what I am most curious about is how the filler lasts. Even if the effect is good at first, I would be disappointed if it fades quickly; on the other hand, I am worried about it staying on for too long and looking unnatural. Looking at the reviews, some people say it lasts about 6 months, while others say it was fine for over a year, so I don't really have a sense of it.

I’ve heard that filler effects vary depending on the area, product, and individual skin condition, but I’m curious about actual experiences. For those who have received fillers for the nasolabial folds or cheeks, how long did the effects last? I’ve heard that they look fuller at first due to swelling but become natural later on, so I’m curious about that process as well.

I would prefer a natural look that just makes me look less tired, rather than something too excessive. ^^ For those of you who have received fillers, please share some realistic reviews on how long you were satisfied.