Hey Sofia!
Azelaic acid is often an effective ingredient for rosacea, but since I haven't seen your skin, it would be best if you do our skin test first 💌 You can find it in the app under Beauty Scan.
The acid doesn't make the skin directly more sun-sensitive unlike AHA acids, but since the sun itself can trigger rosacea, I mainly recommend evening use as it is still an acid (you can mix it with the moisturizer at first to acclimate the skin) if you spend a lot of time outside – and always complement with sunscreen plus a sun hat as well!
Take care ❤️