I had my Tesla app set to not optimize which does work well most of the time. Occasionally I would still walk up to the car when out and it would not want to unlock; I would have to unlock my phone and bring the app up and then the car would unlock. This would happen maybe 1 out of every 10 or 12 times.
However, I had been noticing lately that the battery life on my phone had become awful. I thought it was because I've had it a while (almost 2.5 years) of pretty heavy usage, and the battery was just degrading--and it was, but not entirely to blame. I started paying more attention in the battery usage area of the settings and noticed that the Tesla app (among another I had set not to optimize) was basically always showing foreground usage and next to no background, even though the phone was left in the background the vast majority of the time. So in other words, if I'd been off the charger for 4 hours, I'd see 4 hours of "while in active use" time on the app.
With that in mind, about a week or so ago I set all my apps to either Optimize or Intelligent Control, and it made a huge difference, both positive and negative. On the positive side, although still degraded due to age and wear, my battery is now lasting noticeably longer between charges! I did notice that the Telsa app would sometimes stay in memory too long when not being used, and it would continue to show as active use time. So I've started manually forcing it closed when I'm not out and needing to use the car, and this has really helped. However, the negative side is that I need to be more mindful and bring the app up before walking up to the car or I'm going to be locked out until I do. So, it's a give and take. For the moment, I'm sacrificing some convenience for the sake of phone charge longevity.
Just some observations, do with them as you please.