I have been unable to get Boostrap Tooltips or Popovers to work in my project. I then checked the Demo 1 application and it seems like it's broken over there as well.
For example it's working on the HTML template:
Visit https://preview.keenthemes.com/metronic8/demo1/widgets/mixed.html and scroll down, then mouseover the any of the "Team" pictures and notice the tooltip appears.
It's not working with the VueJS template:
Visit https://preview.keenthemes.com/metronic8/vue/demo1/#/crafted/widgets/mixed and mouseover the same icons and notice no tooltip appears.