This week's issue of Famitsu includes an interview Square-Enix's Tomoya Asano, in which we find out how the pandemic has impacted development of Bravely Default II.
Asano says that while the Octopath Traveler: Champions of the Continent team was set up for remote work, the Bravely Default II team wasn't prepared to work at home at all. This ended up causing quite a bit of trouble for the game's development. The team was forced to switch to working at home with little preparation. That lasted from April 8th to May 6th, and then the team could return to the studio.
Is this going to lead to a release date for Bravely Default II? Last we heard, the game was slated for a 2020 release, but no updates have been shared since. This interview still doesn't give a solid release date, but hopefully Square-Enix will share those details soon.