Looks like we’re getting that “Training arc”, if two episodes can be described as such. Demon Slayer has been a show that’s kept fast pace with fast action. It’s not been especially interested in spending much time with things like down time. Tanjiro gets stronger through a trial by fire-type approach.
We haven’t seen a training sequence since the first handful of episodes. But these episodes have been due for a while now; establishing that our overpowered protagonist isn’t actually all-powerful. Tanjiro has been cleaving through enemies with nary a real struggle up until now, the show needed to bring him down to earth lest it be over in another couple dozen episodes.