Was it the case that the planets were just named that because the god's names were just used for important things like planets or did they think that like Jupiter(the planet) was actually Zeus?
I searched this but there were no results, the only ones I could find were questions regarding why ancient people named planets after gods
No, not in religion or astronomy. There was still the option of equating god with planet as a poetic metaphor, but I trust it's understood that that's a specifically poetic kind of imagery.
I gave a fuller answer on this last year, though I'm quite certain there's still more to add.