Chosen Solution
So background to this, the iPhone has been starting to unexpectedly shutting down. I replaced the screen, a month or two ago, and then got the battery replaced a week ago. On Coconut Battery, the battery health shows that it is good.
If you had something replaced a week ago, and that’s when the change in behaviour started, I would enquire with whoever carried out the work and ask them to fix it. If it came to me like that, one week after a battery replacement, I would replace the battery regardless of what any app told me and work my way through the list of possible faults from there. This is the best thing for you to do , i think.
