Laravel debugbar is available even before Laravel 5.4, but it is not good to use it on production since all of your users will see the debugbar.
I've used Laravel Telescope before, and allowed in the gate to be accessable only to my email: https://laravel.com/docs/8.x/telescope#dashboard-authorization
And also hit play on telescope exactly when you are going to debug, and not all the time, since it will store logs in your database. Or you could have it run all the time, but schedule a command to prune the tables once a day or on 2 days: https://laravel.com/docs/8.x/telescope#data-pruning