Placing a custom structure

I am using Minecraft Java Edition 1.19.2

I created a custom structure in-game
I used a save structure block to save it as ui_1
I copied that file into what I believe is the correct hierarchy in my datapack: datapacks\<datapack title>\data\ronsr\structures\ui_1.nbt
I reloaded my datapack, and saw that it loaded successfully
I tried placing my custom structure with /place structure ronsr:ui_1 but received the error: there is no structure with type "ronsr:ui_1"

Where am I going wrong?
I do not want this structure to generate naturally. I only want to place it with a function.
I read the structure guide, but it doesn't seem to cover this.
https://www.planetminecraft.com/blog/custom-structure-gen-documentation/