Yup, it's all about the Saccharomyces boulardii. It's a plant-based (yeast) rather than a bacteria that adds important and valuable benefits to the usual collection of probiotic ingredients, and I've found it works well during and after antibiotics as well as generally. Here are a couple of resources, one brand's list and a research paper.
https://florastor.com/blogs/flora-stories/5-key-benefits-of-the-probiotic-saccharomyces-boulardii
https://www.mdpi.com/2309-608X/6/2/78