Bootstrap Spacing classes not working

 https://stackoverflow.com/questions/35148828/bootstrap-spacing-classes-not-working

Today 2021 in boostrap 5 Margin and Padding :
Margin
Margin top: mt-value
Margin right: me-value
Margin bottom: mb-value
Margin left: ms-value

Padding
Padding top: pt-value
Padding right: pe-value
Padding bottom: pb-value
Paddig left: ps-value.
Where the range for the value is 0 to 5