The computational photography for those is done on a computer.
And none of those products have nearly the sales of a smartphone to sustain R&D. Similar to how the headphone dongle of an iPhone is much cheaper and yet better quality than most audiophile equipment.
Or handheld HDR stacking but they're more able to deal with that.
For example, I really like live or motion photos.
Also, are you saying you could reproduce any of the on-phone stuff easily on your computer? I’m thinking about the astrophotography modes, portrait modes, live photos, and low light features.