Yes, version 8 with Jetstream doesn't comes with Boostrap or jQuery anymore. Instead, it includes Tailwind CSS and Livewire or VueJS wit Inertia as default options.
If you haven't started coding on this project, you should create a new project from the beginning following this article:
https://www.parthpatel.net/laravel-8-bootstrap-auth-scaffolding/
And then this other from the same author, showing an example of Laravel 8 with Bootstrap and jQuery
https://www.parthpatel.net/laravel-ajax-crud-bootstrap-jquery/
Hope this helps!