simple RTL plugin for Bootstrap 4.5.* with this version you can use official vertion css or scss bootstrap 4 and add this rtl bellow it
usage:
<!-- Original Bootstrap 4.5 -->
<link rel="stylesheet" href="bootstrap.css">
<!-- OR SCSS version -->
@import '~bootstrap/scss/bootstrap';
<!--Then after add original css or scss add Bootstrap RTL -->
<link rel="stylesheet" href="bootstrap-rtl.css">