[DNSB]

Sorry but I edit my Kobo purchases so they are sideloaded with cleaned up metadata. I don't edit Kobo Plus books due my quasi-religious opinions about them not being my property. Though as near as I can tell, when I archive a book synced from Kobo, I no longer see it on my Kobo ereader and a sideloaded edited version is treated as a new book. I did some playing with this and I can change the series name and number in calibre and it will update the information for a purchased book if I have Update purchased books enabled and I have matched books between device and calibre.

Edit: I went back and looked at when I changed the series name for Mercedes Lackey's Valdemar series books to Valdemar : Subseries_name. Once I made those changes, I used KoboUtilies update metadata tool to update the metadata on the device and the series names changed (along with a couple of numbers that were incorrect to start with).