This is another trap, one that's extremely rampant with people looking back on history but who also have a shallow knowledge of history, this idea that ideas and concepts can't occur independent of each otherI really think that’s a big stretch. Evangelion first aired in 1995 - not sure when the manga began publication - and FFVII came out in 1997. Given what we know about lead times and shit, if there was any inspiration I seriously doubt it was significant.
Perhaps there IS a connection between Eva and FF7, but if there is, it would likely be rooted in both being mutually inspired by the same thing that came before both. Or they could have zero connection and any similarities are people finding an arrow in a tree and painting a bullseye around it.
I found a book the other day that was someone arguing William Shakespeare didn't write what he wrote but some other noble because said noble experienced events that could vaguely, maybe if you squint, be similar to the plots of what Shakespeare wrote. Ridiculous, but also insulting in its implication that creativity is shackled to lived events and can't be separate from them.