Those drinks only have one or two types of bacteria in them so unless you are lacking those they won’t make any difference to you. You can get a more diverse gut bacteria and there are studies that show benefits to conditions like ibs from improving your gut diversity.
To improve gut diversity foods like kefir, kimchi and sauerkraut can help but they need to be homemade version’s not supermarket versions as these have usually been pasteurised. I make kefir. It’s really simple and contains dozens of bacteria, yeasts and viruses that live in a symbiotic colony.
The other is to live a healthy lifestyle of wholefoods, lots of veg and minimal processed stuff, good sleep and reduce stress.
I’ve found my digestive health has improved since taking kefir. No more diarrhea.
If you’re on Facebook UK fermented foods is a good place to learn.