I feel like my skin is losing elasticity... How should I care for it? I'm curious about how to improve skin elasticity.

Lately, every time I look in the mirror, I feel like my skin isn't as elastic as it used to be. My cheeks and the area around my eyes seem to sag immediately after I smile, so I'm wondering if I really need to start taking proper care of my skin's firmness. When I search online, retinol, peptides, and collagen are frequently mentioned as ways to improve skin elasticity, and I'm curious if there is actually a significant difference in their effectiveness. When reading recommendations for firming skincare products, some people recommend firming ampoules, while others insist that firming creams or eye creams are a must. Are there any products or ingredient combinations that are gentle on the skin of people in their 20s to 40s and suitable for consistent use? Please share any firming care methods that have actually been helpful to you!