Select2 Single & Multi does not get the look of Bootstrap5


I am using Select2 with single and multi select with bootstrap5 default (no theme) but cant get the look and feel to match with other input fields.

single select display is of much lesser height, multi-select height though is just slightly less.
Border colours of both are darker.
an image of multi, single and a normal text input for reference is attached.

To answer my own question:

the documentation at Build tools - Select2 Bootstrap 5 Theme worked