It's all about the carbs. Dry reds are fine, and equally dry white is fine, but whites tend to be more carby. As a rule, wine of 13.5% or above either lowers my levels or has no effect. I wouldn't trust, say, a sweeter Riesling.
Port and sweet sherry are obviously out, but fino or manzanilla sherry is fine. Amontillado is borderline.
Gin, Vodka, Whisky and other spirits drop my blood sugar levels, tequila seems to drop it more than most, but it needs to be the real deal coz cheap stuff can have added sugar- rum likewise: the good stuff is fine, especially white/oro. Brandy/Cognac/Armangnac/Calvados can have added sugar- not much, but still.
All liqueurs are out. Basically all aperitifs- Campari etc- are no good. Pernod and absinthe won't be any good. Ouzo usually has added sugar, so that's out. Vermouth- Martini, Cinzano, Noilly Prat are out
Beer isn't great in general, but as noted above, there's a vast range and vast difference within that range.
Sake is pretty terrible for diabetes, but Shochu is great, Korean Soju likewise, and Okinawan Awamori is also great.
Moutai was fine when I had it last, but there tends to be hidden sugar in many of the Chinese wines.