Plasma 5.27 is not getting any more regular timed releases. However in the past for LTS releases we have said that we would just make them on-demand if there's enough stuff.
I've seen enough patches over the last month that warrant putting into 5.27 with people not cherry-picking some major fixes because "there's not going to be another release". I want to request that we do at least one more spin some time in the next few months. David