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 đź’Ś 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 ❤️