Biblioshiny Query question

I’m new to using RStudio. I successfully installed Biblioshiny today, but when I try a new search query under ‘gather data using APIs’, I only see PubMed or DS Dimensions in the database dropdown. I was expecting to see others such as Scopus, WoS etc.
Any pointers on what I’m doing wrong would be gratefully received. I hope I’ve added this question appropriately. Sorry if I haven’t.