Yes. Many do. TL; DR:
There is no sub-banding. So in a rather meta-way that pleases my forum name, it neither exists as there aren’t any and exists as a single entity.
I may be wrong (not unusual) but I liked my answer too much not to post.
Any further discussion will have to involve answers to the questions above. Particularly as all the alterations that you’ve made to the LMn code base will largely be countermanded by the LNS with the settings on an OTAA join - unless you are trying to speed up the join by restricting the frequencies initially used.