The team behind Fallout 76 has reaffirmed their commitment to official mod support in a panel during QuakeCon's broadcast to the Netherlands. When asked about the possibility of mod support in a Q&A, Fallout 76 project lead Jeff Gardiner said, "We are definitely still working on mod support, it's coming." Gardiner notes that adding mod support to Fallout 76 is a lot of work because of the client-server architecture at the core of the game, as opposed to previous singleplayer Fallout games. Bethesda has always been clear that official mod support for Fallout 76 was planned, but wouldn't be available until long after launch. You can listen to the whole answer here.