Right now, Bootstrap has the following classes available for "row" container:
row-cols-1, row-cols-2, row-cols-3, row-cols-4, row-cols-5, row-cols-6
row-cols-sm-1, row-cols-sm-2, row-cols-sm-3, row-cols-sm-4, row-cols-sm-5, row-cols-sm-6
row-cols-md-1, row-cols-md-2, row-cols-md-3, row-cols-md-4, row-cols-md-5, row-cols-md-6
row-cols-lg-1, row-cols-lg-2, row-cols-lg-3, row-cols-lg-4, row-cols-lg-5, row-cols-lg-6
row-cols-xl-1, row-cols-xl-2, row-cols-xl-3, row-cols-xl-4, row-cols-xl-5, row-cols-xl-6
Here is an example of use:
<div class="row row-cols-1 row-cols-sm-2 row-cols-md-4">
<div class="col">Column</div>
<div class="col">Column</div>
<div class="col">Column</div>
<div class="col">Column</div>
</div>