@rittels You are right. I didn't want some of my plugins to be listed in the gallery as they are not very useful for others. However, I just learned that it's possible to have an approved but unlisted plugin which is fine with me.
Thanks for the feeback @Gkikas-LGPZ. Easy fix. Either I had originally missed it, or it was added by Windy later, but there is indeed a 250mb datapoint. All I had to do was add it in. You may need to give it a few hours to update, but I've published the change.