Yes, that is possible. Part of MeToo, as interpreted by liberals, was establishing a sort of quorum of those who had been victimized. The fact that other survivors were coming out with their experiences made it seem safer for each person to feel like they could reveal their own experiences. If liberals were disproportionately likely to notice the quorum, then they would be disproportionately likely to contribute their own stories, resulting in a positive feedback loop. That may be an even better explanation for the discrepancies than algorithmic balkanization.
In either case, for the people that I observed posting about it, MeToo was not symbolic; it was explicitly grounded in personal experience. But it's possible that the messages propagated differently in different areas of the social network, such that some others viewed it as symbolic.
This could be "confirmation bias" or perhaps more accurately the Baader-Meinhof phenomenon... liberals tend to be more in-tune with the MeToo movement and therefore would be more likely to recall having seen it.