Chronic insomnia despite healthy habits - could it be genetic?

I've struggled with insomnia since childhood, and I've tried everything to improve my sleep hygiene. I avoid caffeine after lunch, get plenty of sunlight and exercise during the day (I box for 2 hours in the afternoon), and use blue light filters when reading before bed. Despite all this, it still takes me hours to fall asleep most nights. My dad has similar sleep patterns - he's a night owl who needs afternoon naps. I'm wondering if there could be a genetic component to my sleep issues. Has anyone else experienced this or found solutions for chronic insomnia that persists despite good sleep habits? Any advice would be greatly appreciated.