Components Panel is organized into various HTML blocks which is grouped into several sections like Layout, Features, Authentication, etc... You can drag and drop those blocks into the canvas.
You can also use the "Search Components" to quickly find the components you need to work on.
For any framework -> Bootstrap 4 / Bootstrap 5 / Bulma, you can find common components along with other components which are as follows
Core Bootstrap / Bulma
Under Basic, you can find all essential basic elements to build a page like Link Button, Map, Youtube Video, Image Block, Icon Block, ...
Under Layout components, where you can find all the essentials to form a layout like
Full width -> Container Fluid
Grid Components (1 Col, 2 Cols, 3 Cols, 4 Cols, 8 - 4 or 4 -8 Cols Grid) based on the framework Grid styles
Under Core Components, where you can find default framework Components like Jumbotron, Hero, Card, List, Sliders, etc... depending on the framework you choose.
Where you can find various Navbar components with different styles.