Bootstrap 5 Toasts Style

Is it possible to edit the following sass variables in the advanced view of the Theme Manager?

$toast-max-width:                   350px;
$toast-padding-x:                   .75rem;
$toast-padding-y:                   .5rem;
$toast-font-size:                   .875rem;
$toast-color:                       null;
$toast-background-color:            rgba($white, .85);
$toast-border-width:                1px;
$toast-border-color:                rgba(0, 0, 0, .1);
$toast-border-radius:               $border-radius;
$toast-box-shadow:                  $box-shadow;
$toast-spacing:                     $container-padding-x;

$toast-header-color:                $gray-600;
$toast-header-background-color:     rgba($white, .85);
$toast-header-border-color:         rgba(0, 0, 0, .05);

The original white styling doesn’t look too good on darker sites so it would be nice if I could edit these maybe i’m missing them in Theme Manager or are they not implemented?