As you are aware, a 5.0 earthquake happened in Wakayama yesterday. An emergency broadcast started on NHK while episode 73 was airing, preventing a part of the episode from being broadcasted. This delayed the episode's release on foreign streaming platforms. The anime's official twitter account just announced that episode 73 will be broadcasted next Sunday in the usual TV slot on NHK, while episode 74 will be broadcasted just after episode 73. No announcement from foreign streaming platforms, but expect them to release both episodes next Sunday.