The iPhone plus being more popular than the mini seems to be corroborated by the developer of the Apollo Reddit app.
Per that “14 Plus more popular than 13 mini article” it's kinda interesting looking at the stats for my apps because they kinda mirror it, but not for technical folk. in Apollo the breakdown is the opposite, 7:1 more users of the 13 mini than the 14 Plus. (1/3)
mastodon.social
There are 7 times the number of 13 mini users compared to the 14 plus phone for his Apollo app, but the catch is that his app tends to be more popular amongst the tech savvy crowd, who tend to own multiple devices, and can thus get away with owning a smaller screen.
In contrast, there is (slightly) more 14 plus users for his other app, which is geared towards more casual users, who tend to have only one computing device (their phone), and thus prefer a larger screen.
It’s a similar analogy to the user base for macrumours (a poll on the iPad forum suggests that the majority of users here own an iPad Pro model, which we know is not representative of the overall iPad user base).
I would caution against taking what this forum says at face value. It has had a pretty poor track record of predicting what users want, or what Apple ought to do.