Use the .align-items-*-stretch classes to stretch single rows of items on different screens.
.align-items-stretch:
.align-items-stretch
.align-items-sm-stretch:
.align-items-sm-stretch
.align-items-md-stretch:
.align-items-md-stretch
.align-items-lg-stretch:
.align-items-lg-stretch
.align-items-xl-stretch:
.align-items-xl-stretch