When you eat foods containing sucrose in moderation the sucrose is perfectly fine for your health.
But when you eat a lot of foods containing sucrose then it's not very good for your health.
Sugar including sucrose is toxic to humans in large enough amounts but you'd have to eat gobs and gobs of the sucrose or sugar before it became toxic enough for your health.
As long as you don't eat too much sugar or too much food that contains sucrose then your health should be okay.
If you have liver problems then eating too much sucrose could harm your liver as well so be careful.
As long as you're overall healthy anyway then the sucrose you eat in small amounts should not be bad for your health nor should it cause any harm.