If you can get raw image data from the sensor, then there will be apps to produce images without AI processing. Ordinary people love AI enhancements, so built-in apps are optimised for this approach, but as long as underlying data is accessible, there will be third-party apps that you can use.

That's a big IF. There's ProRaw but for that you need an iPhone Pro, some Androids have RAW too but it's huge and lacks even the most basic processing resulting in photos that look like one of the non-final steps in the post.

Third party apps are hit or miss, you pay for one only to figure out it doesn't actually get the raw output on your model and so on.

There's very little excuse for phone manufacturers to not put a toggle to disable excessive post-processing. Even iOS had an HDR toggle but they've removed it since.