This is one of the few dozen more popular feature requests over the years. Some stock agencies, including Adobe Stock, ask submitters to put the most relevant keywords first, but LR sorts the keywords alphabetically before inserting them into industry-standard metadata fields. LR users have asked for an option that would disable that:
https://community.adobe.com/t5/ligh...keywords-instead-of-alphabetic/idi-p/12249097
(Adobe Bridge maintains the entered keyword order.)
LR 11 introduced a very limited ability for LR to submit ordered keywords to Adobe Stock using an Adobe-proprietary metadata field. But it was poorly designed and very difficult to use:
https://community.adobe.com/t5/ligh...s-instead-of-alphabetic/idc-p/12526371#M13291
I'm guessing the LR team implemented this feature under higher-management diktat to support Adobe Stock, and the LR team expended the least effort required.