I’d think it’s just as likely they reinvented a wheel for fun/learning if I’m looking at a personal project… I also don’t judge hobby projects for absence of unit tests.
I have used those topics as discussion points after looking at code someone volunteered as it can be very enlightening, but to hold hobby code to a professional standard is kind of nuts tbh.
I’ve only ever given a cursory look at personal repos when they’re volunteered. I’m most likely to just look at a readme and maybe look at a small section just to see what the style looks like and if any characteristics stand out, then maybe use discussion of the project (with standard topics I ask everyone unless I happened to see something interesting) as a discussion starter.
In summary, at least from my perspective, I would recommend just doing whatever interests you and being ready to discuss, if you volunteer a project. I also generally think the impact of presenting a portfolio of personal projects tends to be overestimated.