I’m hoping these may be just temporary. I think the last time this happened the shows ended up with dubs. I’m hoping that is case since Giant Beasts of ARS Sentai actually was part of the production if I’m seeing right.
The two days notice is a bit odd though for shows they got just around 2 years ago. Maybe they did a short streaming license from Kadokawa and because of the new controllers of them they did not let them renew.
Anyone’s guess though as you rarely get info about these things unless it’s Discotek.