A lot of "NA" beers are also 0.5%. Incidentally, freshly baked bread is also often around 0.5% depending on the type of bread, as are very ripe bananas.

If you want a not-really-beer that's trivially easy to make at home, I suggest kalja

Just mash 100% dark rye (weyermanns chocolate rye) for.... some arbitrary time period (hours, and you don't even really need to keep temp up), maybe with some sugar for speed, and then ferment for... days (? 2 days? whatever), strain, and bottle (if you don't care about carbonation, just use mason jars), and stick it into the fridge for another couple days.

It's anywhere between 0.1-0.7% ABV depending on temperature, length of fermentation, etc.

Bonus, compared to kombucha, it doesn't look like some alien growth thing while fermenting