Hi winky 57, and welcome to the forums.
There's a couple of ways to answer your question, so I need to make clear I'm answering from the point of view of a T2 who wants to keep carb intake to a minimum, not about the alcohol itself. With that in mind, it also depends what I've eaten the rest of the day - if it's been next to no carb, I can be a bit more relaxed.
The other thing to remember is that alcohol ties up your liver for a while. Until the liver has metabolised the alcohol, you can find that BG readings fall in the short term.
So - for alcoholic drinks I find most spirits (as zero carb) to have as you would expect no impact on my BG - I don't tend to use any mixers but if so they would be zero sugar ones anyway. Wine is generally OK too - although there are some carbs, they need to be judged in the context of how much wine you drink.
Beer is unfortunately pretty high in carbs so I either avoid it altogether or on rare occasions, if my carb intake has been otherwise low, have one or two. I do drink a couple of zero and very low sugar beers at home.
Fruit juices are completely out and things like most cocktails, sherries and ports are once in a blue moon items.
Most sorts of made up bottled alco-pop drinks have a lot of added sugar - didn't drink them anyway and certainly wouldn't now.
Non-alcoholic - tea, coffee (with cream if possible), things like Coke Zero, soda water, etc. Many "energy drinks" have a zero sugar option, which if OK if you're fine with artificial sweetners. Milk does have carbohydrate in the form of lactose and hot milk will deliver a rise in my blood sugar very quickly.
https://www.dietdoctor.com/ has some useful information. There's also a website
https://getdrunknotfat.com/ which lists drinks by carbs (and calories, not that I count calories).
The other thing to remember is that if you are low-carbing it can change how alcohol hits your bloodstream. In my experience, tolerance markedly decreases, so watch out for that.