On Usenet recently someone brought up the possibility of solar systems forming around Pop III stars even though, being huge, they would’ve lived only a few million years. Giant stars have short lifespans of only a few million years, a few tens of millions of years at most, and I am incredulous that any substantial planetary system could develop around stars with such short lifespans.
Pop III stars were the first stars in the universe, none are around today, and thus they’ve never been directly observed because they are so old. (They’ve been indirectly observed tho, including by means such as detecting supermassive black holes.) One is better off looking for solar systems around main sequence and dwarf stars, especially if one is looking for ones with life in them.
Said poster also brought up that only gas giants could’ve presumably been found orbiting Pop III stars, but I would like to point out that the cores of gas giants are still metallic, and so would’ve required heavy elements for the gas to accrete to, which would’ve existed long after the Pop III stars went supernova, since they would’ve lacked the heavier elements in their makeup necessary for even gas giants to form.