In the PM, before the moistruizer, you could add a niacinamide serum, for example, https://whatsinmyjar.com/product/revox-just-retinol-in-squalane (the product is called "retinol serum" but actually it doesn't contain retinol, but has a good concentration of niacinamide instead :) )
Hello Leonor!
You are using way too many products, and some of them can't do anything good for your skin unfortunately.
From your current routine, I'd only keep the cleanser (if you like it) and the Night nourishment cream.
I'd upgrade your sunscreen to get more UVA protection, for example, to this product: https://whatsinmyjar.com/product/garnier-ambre-solaire-anti-age-super-uv-face-protection-spf50-cream
Add an Ascorbic Acid serum: for example, https://whatsinmyjar.com/product/dr-brenner-vitamin-c-serum-20-pure-l-ascorbic-acid-ferulic-acid-vitamin-e-and-hyaluronic-acid (you can browse similar products to find one available in your country)
In the PM, before the moistruizer, you could add a niacinamide serum, for example, https://whatsinmyjar.com/product/revox-just-retinol-in-squalane (the product is called "retinol serum" but actually it doesn't contain retinol, but has a good concentration of niacinamide instead :) )