I have one, as I still had a mini 2 and decided to get a mini 5 over the weekend.
I did that after trying a kindle as my main e-reader for a couple of weeks and just hated the UI, after using various iPads for 9 years and the im2 was just slow and home button didn’t work as well anymore.
There not the same size and mini 5 is bigger buy a few mm 3-4 maybe. The top will catch, but the bottom pops out where it’s a tad long, none of the ports line up except headphone and if it fits the charging. Been laying it under a stack of books the last two night hoping the leather will stretch.
Not holding out hope, ordered a $10 moko case from Amazon.
Really would love another like this as it covered everything 360 deg, any of the leather case makers have made one?