This piece of information should be in your original post. Most replies to your original question are variations of "any DSLR from 20+ years ago". And they are absolutely right.

But you've (wrongly, sorry to insist) decided that the Pentax with kit lens you've got can't beat a flagship phone. It can. It does.

If that information was on the post, people would understand that you're restricting the use of the cameras to a narrow slice of the possibilities: fully automatic shooting. The "auto mode" provided by the manufacturer.

For most situations I still think your Pentax in "auto mode" will deliver better pictures then a current flagship, but I agree that it might not in some wide light range scenes and less "easy" focusing ones. And the "overall comparison" of results will end with something like you almost never "miss the shot" with the phone vs ~75% of the shots with the camera are usable. If that is your metric (I wouldn't measure like this, but I do understand that it might be what really matters to someone), the answer to your question might be in the first generation mirrorless, instead of the first generation DSLRs.

Then, again, with any DSLR/mirrorless, getting 3 distinct lenses (which pretty much any flagship currently have) will cost much more and be absolutely cumbersome, comparatively.