No, Andrew deleted his Discord account a while ago. Regardless, having the creator present does not make a space official, it's a matter of who owns the space and what the general policy is.

The general policy of the Zig Software Foundation is to not have blessed community spaces outside of spaces used strictly for coordinating the development of Zig (those currently are the Ziglang GitHub Organization and the ZSF Zulip), so all communities are equally non-official.

The main Zig Discord server is owned by community members and is actually not even the only Zig server on Discord.

I thought the Zig creator abandoned Discord due to invasive ads sometime last year.

That wouldn't necessarily make it official though