I use Lightroom on my phone in addition to my iPad and MBP so the better screen is nicer; especially since OLED is brighter and more viewable outside.
You might not on your 13, but I do on my XR. I've had apps reload, losing my place, when I temporarily switch to Safari to read something. Double the RAM will alleviate that.
Whether or not it could is irrelevant. Apple says the XR does not have a powerful enough processor/neural engine to support the more detailed scanning needed for that feature. It's a convenience feature that I will enjoy with my new 14. I believe them more than people who see nefarious machinations everywhere.
My XR doesn't have any of the latest computational photography tricks like Smart HDR, Night Mode, or Sweater Mode so based on the existing capabilities and expected features and camera updates, I think it will be.