data-kt-countup was in vue.js demo1
but it doesn't work... why.
At the moment, we do not support countup in our vue version, since all markup was taken from our HTML version, some of the initialization attributes were not removed. We will consider including countup plugin in our vue version in the next release.
For now, you can use the plugin below:
Or if you want to use the same countup plugin you can refer to our HTML version: https://preview.keenthemes.com/html/metronic/docs/general/countup
Keenthemes Support Team