Buttigieg and Roy Cooper are definitely on that list.
Now that he's sold his house in South Bend, Buttigieg needs to move to Arlington so he can run for governor of Virginia in 2025. It's a little thin for a vice presidential resume, but three years as governor could be enough to make him a credible running mate in 2028.
I don't think Buttigieg would be viewed as inexperienced necessarily, even if he didn't run governor. By 2024, he will have been one of the most visible Democrats in the country for five years. By 2028, nine years. Regardless of his actual political experience, voters will be completely familiar with him and won't view him as a new/inexperienced. Mitt Romney, for example, was only governor for four years. Despite having a relatively slim resume in public service, no one questioned Romney's experience when he was the nominee in 2012. Buttigieg will have been mayor, secretary of Transportation, and will have universal name recognition.
Very true.
Also, while I detested him as a candidate in 2020, Buttigieg clearly was well versed in national political issues. I'm not worried about him being unprepared for the presidency (more worried about him not really standing for anything/having no real ideology).