Mhm the way marx used these terms is different to the way they may be used colloquially now. post-scarcity doesn't mean like all goods are no longer scarce but rather that people's basic needs are no longer materially scarce (ie famine is no longer a matter of purely physical inability to farm enough food to feed the entire population). Marx's definition of a post scarcity society is:

"The free development of individualities, and hence not the reduction of necessary labour time so as to posit surplus labour, but rather the general reduction of the necessary labour of society to a minimum, which then corresponds to the artistic, scientific etc. development of the individuals in the time set free, and with the means created, for all of them."

I think being sure to remember the time period that Marx was alive in (during the very first transitions from feudalism to capitalism) can help put into place that our current idea of "superabundance" would have been almost entirely unimaginable to somebody in the 1800s, but the idea that technology would allow us to provide for everybody without having to make compromises was comprehensible albeit differently to what that would mean to us.

And post-industrial would literally mean a society that has gone through the process of industrialization, as the deindustrialization of countries such as the US was a gradual 20th century phenomenon.