According to Wikipedia, Proxima Centauri is 400 times as far from Alpha Centauri A & B as Neptune is from the sun, and would appear only as a fifth-magnitude star viewed from Alpha Centauri. Apparently it hasn’t been conclusively proven that it is gravitationally connected with the two brighter stars although it seems to be.
Proxima Centauri is something like 11.5 magnitude from earth.
Kinda like trying to spot a single birthday candle from 10 miles away.