Most serials on here, that I've seen, seem to fall into action-dominated genres: xianxian, litrpg, superhero, some space opera, etc. This means that every update there's something dynamic happening--chases, fights, disasters, battles, whatever. Lots of excitement to read, and I've enjoyed several already.
My serial (it's next on the submission queue) has about 20K words posted, twice that much written. Of the nine updates up so far, only three contain any kind of "action" (in the sense above), and only one of those is really dominated by the action. There are extended action sequences later on, including three updates in a row due to post in about a month--but it's mostly a fantasy drama punctuated by fight sequences. Is this compatible with the serial format? Don't get me wrong, I keep the story persistently moving forward, but often that's in the sense of making a difficult decision or persuading someone, and there's a lot of gradual revelation of the world and how the hero fits into it. Is there an audience for this, and is it possible to sustain interest with this material when there's only one update per week?
(yes, lots of this is tied up into the usual authorial self-doubt, which I'll spare you)