Any tips for damaged nails after gel?

Hi everyone! I wanted to ask for your tips on getting healthy, strong nails after gel damage. My nails have already grown out quite a bit, and the damage is mostly just on the tips now, but I’m wondering if there are any products or routines that could help make them even stronger

right now I’m using Sally Hansen Hardener, Essie nail polish, and cuticle oil, but the nail polish I’m currently using keeps chipping off so nail polish recommendations that are long lasting would be also highly appreciated