I'm 40 this year so Gen Z are not supposed to look at me and think I look cool, that's just not the natural order of things. I don't want to look like a teenager but neither am I ready to say "fuck it" and give up looking stylish/current completely. I don't slavishly follow trends that I don't like or don't suit me but these are some things I think keep my overall look reasonably fresh/current without being OTT about it.
Understated gold jewellery, hoops or teardrops instead of studs.
Wide leg trousers/jeans- this has always been my preference as its what suits me.
Oversized shirts, neutral and either plain or a subtle stripe. I tend to wear these open, over a fitted plain camisole top or bandeau top
Tote bag or slouchy shoulder bag instead of cross body bag- again this was my preference before it was fashionable as cross body bags irritate me when I'm walking around.
Swapping a cropped denim jacket for an oversized denim jacket or "shacket"
Swapping florals for abstract prints. A 90's style midi/maxi slip dress in a monochrome abstract print with one of the aforementioned oversized shirts and some neutral coloured trainers works well IMO
Sunglasses just low enough that eyebrows are visible rather than pushed right up to the bridge of my nose
Swapping long cardigans for 90's style shorter tie-front cardigans
Subtle make up, eyeliner on top lid only, cream blush instead of powder, minimal eyeshadow
Adidas or Vans trainers in neutral/beige shades, I like chunky trainers on other people but they don't suit me, I think they age me actually.
I do have some midi floral dresses in my wardrobe that I think I can still pull off with the right jacket, trainers and accessories. I never liked skinny jeans so even if they make a come back ill be avoiding as they don't look nice on me.