One demining expert claims that the rats are actually no good, but the charity persists with them anyway: https://nolandmines.com/APOPO%20rats.html

I have no expertise. His arguments sound very plausible though.

This is the most technical post, and it will go almost unnoticed.

A cool story about a rat or a dog draws more attention than mines which were missed and maimed people years after searching the field.

Anyways, the author of that piece is a little mad, but in the sense that it is worth serious consideration. TLDR: the rats aren't cost effective and, worst of all, haven't scientifically proved to be effective.