Is 92% battery health normal for a 5 months old iPhone 13?

"Health" is an inexact and non-linear number. What was your % when the phone was new?

Individual batteries can range from 98-102% health when new due to the vagaries of chemical processes and battery production. "100%" is based on an AVERAGE capacity of all batteries of one model. My iPhone SE 2020 started with 102%; "average" means some soul out there got one that was 98%.

A rough rule of thumb is that, with normal usage patterns, capacity drops at a rate of about 1% per month. Note "about." Remember, capacity is too inexact to be called a "metric."

Things to consider:

• Allowing the battery to repeated run to zero charge can reduce its capacity. I recharge when remaining charge is between 20 and 40%.
• Capacity can decrease faster if you practice a random or inconsistent charging pattern.
• Developing a consistent charge pattern allows the phone to learn the pattern for better battery life before replacement is needed.

My SE is 34 months old and charges every night on a QI charger. Its health as this moment is 86%.

I also see you are running a beta version of iOS. Hard to judge when the final incarnation has yet to be released.

Normal for someone who is using their iPhone extensively most days.

But, since it appears that you have installed beta software on your phone, you can't really rely on the current settings as accurate. They might be....and they might not be.