There are no classes in Bootstrap 4.x beginning with `.left` or `.right`.
(You can do a `CTRL`+`F` on https://cdn.jsdelivr.net/npm/bootstrap@5.3.1/dist/css/bootstrap.css to check)
### Utilities
- <span class="badge bg-danger">Breaking</span> Renamed several utilities to use logical property names instead of directional names with the addition of RTL support:
- - Renamed `.left-*` and `.right-*` to `.start-*` and `.end-*`.
- Renamed `.float-left` and `.float-right` to `.float-start` and `.float-end`.
- Renamed `.border-left` and `.border-right` to `.border-start` and `.border-end`.
- Renamed `.rounded-left` and `.rounded-right` to `.rounded-start` and `.rounded-end`.