Wikimedia Foundations product teams are: Contributors, Anti-Harassment Tools, Community Tech, Editing, Growth, Language and Readers. There are also other teams such as Design, Analytics, Strategy, Wikidata.
Those are transverse, except for Wikidata, and their range is supposed to be all projects. In fact, I have the feeling their scope is mostly Wikipedia, and sometimes mostly English Wikipedia. I feel it is often quite difficult to have dedicate developments or dedicate notices for a specific project.
Facts are: contributors on Wikisource are different than contributors on Wiktionary, harassment can be dealt with separate strategies in smaller communities, development needs are unique for each projects (and nowadays almost none are made for specific needs), editing tools are not adapted for most of the projects except Wikipedia (VisualEditor for Wiktionary?), Growth perspectives are different, etc.
Also, design principles could be shared but user experience (UX) is different if you look into an encyclopedia or a dictionary, if you want to read a book on Wikisource or to look for a course in Wikiversity. I haven’t read any specific advice for Wiktionary UX, and I imagine no dedicate tests have been made for this project (or for Wikisource, Wikiversity, and so on).
During this last four years, we made several submissions in the Tech Team wishlist for Wiktionaries, without any success.
Maybe we should change our strategy and also solicit the other teams. I think it is very difficult to do so for a group of volunteers such our. We need a large amount of time to collect and write analysis on each topic. So, should we better consider Wiktionary and each sister projects are products and in need of dedicated product managers?