What going on with Welcome to the Diner of the Exiled! ?
Is someone still translating this? If so hasn't anything of the other volumes released since the first volume?
Yes, this title is currently licensed, and being translated by Tentai, in their most recent blog post they said they are in the process of acquiring the license for V2.
They also do have a calendar, https://tentaibooks.com/en/release-announcement-schedule/ which has a tentative release date for April.