These are red giant stars which, due to their size, are very easy to see with telescopic magnification. G-class main sequence stars, like our sun, would be much harder to at these distances (500+ LY). I’m surprised we don’t have pictures like this of other closer main sequence stars like Proxima Centauri.
Proxima Centauri is a class M dwarf star that is about 200,000 km in diameter. At 4.25 light years that gives it an angular diameter of about one mili-arcsecond. Antares has an angular diameter that is 41 times greater.
For comparison, Jupiter is about 140,000 km in diameter so you are actually looking at something that is more the size of a large planet than the sun which is 1.4 million km in diameter.
Proxima Centauri is a red dwarf..................