Galvanic corrosion would be more of an issue over abrasion.
However, it could have the potential to damage stainless steel at higher temperatures, like in a milling machine.
This is secondhand info from a stackexchange answer over a decade ago.
this post was submitted on 29 Jul 2023
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I don't see how graphite could induce galvanic corrosion. It's a good electrical conductor, not so much for ions (larger than lithium). And the metal itself is already electrically conductive. The only possibility I could think of is spontaneous oxidation from the air, but it's stable to a few thousand °C so... this isn't adding up. You can even use graphite crucibles for metallurgy.