My daughter hasn't been using the day care toilet for poo-poo. She is otherwise potty-trained. I think it has got more to do with the security and comfort. Any tips on how i can convince her to start using the school toilet?

Maybe there is something lacking in the bathroom at your daughter's daycare, something that's available at home but not necessarily in school? My little cousin was toilet trained to use a bidet or wipe wet wipes at home but there's only toilet paper in his school. After his mother realised this, she packed wet wipes in his bag and the problem was solved.