Have I been Hacked

A fallacy.. sort of like blindly relating battery drain to hacking rather than checking to see what your battery health is?

Go to Settings > Battery > Battery Health, what is that percentage?

While you're in Settings > Battery, what does it show for apps at the top of the list?

Did you recently do an update or anything?

If you did not jailbreak it, it is virtually impossible for the device to be “hacked”.

Check the battery usage statistics and the battery health in settings.

Is a 'heartbeat' an exaggeration? How quickly in units of time does it drain?

What is the model and age of your phone?

Did you recently update? After an update battery might seem to drain for a few days as the OS does things in the background.

Have you ever force restarted the iPhone? Could try that..

Force restart iPhone - Apple Support

It's entirely possible that the Battery Health percentage is wrong or there is some other issue with your battery. May need to take it in and get it checked out.

Is it possible… sure. There is a non-zero chance that you’ve been hacked.

There is also a non-zero chance that you will win the lottery every day for a month…

You have not been hacked. So long a you pursue that line of reasoning, you are not going to solve your problem.

So no answer to my inquiry of battery drain time? Or your iPhone model & age?

Did you try a force restart?

You deleted some apps and want to know if doing so allowed someone to access your phone??

No