What tools are available to study protein glycosylation in bacteria?

Thank you for your question! I am not an expert on this topic, but I am aware there are increasingly more tools to study glycosylation in microbial organisms. For example, directly related to microbial glycoproteomics, I would refer you to this review: PMID: 28365498; while for a more general overview I would recommend you check out the chapter of the Essentials of Glycobiology (PMID: 35536956), which also contains several references that might be of help.