First stable release of yiisoft/bootstrap5 package was tagged. The package presents Bootstrap 5 UI framework in terms of Yii widgets allowing easy usage in PHP templates, theming and more.
<?php
use Yiisoft\Bootstrap5\Carousel;
use Yiisoft\Bootstrap5\CarouselItem;
use Yiisoft\Html\Tag\Div;
use Yiisoft\Html\Tag\H2;
use Yiisoft\Html\Tag\P;
?>

<?= Carousel::widget()
->id('carouselExampleOnlyText')
->items(
CarouselItem::to(
Div::tag()
->addClass('bg-primary text-white p-5 text-center')
->addContent(
H2::tag()->content('Title 1'),
P::tag()->content('This is the first slide with text.'),
),
),
CarouselItem::to(
Div::tag()
->addClass('bg-success text-white p-5 text-center')
->addContent(
H2::tag()->content('Title 2'),
P::tag()->content('This is the second slide with text.'),
),
),
CarouselItem::to(
Div::tag()
->addClass('bg-danger text-white p-5 text-center')
->addContent(
H2::tag()->content('Title 3'),
P::tag()->content('This is the third slide with text.'),
),
),
);

Check more examples in the package user guide.