Hey there, NickNaam47.
Welcome to the Apple Support Communities. It’s understandable that you’d be want your battery to last as long as possible, so we can see why you’d want a resolution with your battery life after updating.
Check Settings > Battery for the last 24 hours. Is there a specific app which appears to be consuming more power than others?
Also, check Settings > Battery > Battery Health. If your battery is 80% or higher, then it’s considered to be healthy: iPhone Battery and Performance
If the issue continues, check out some ways to maximize your battery life: Batteries - Maximizing Performance - Apple
We hope this helps! Don’t hesitate to reach back out with questions.
All the best.