If you wrote your project in Laravel 9, you are out of luck.
Laravel 9 (the current one as of this post) only supports PHP >= 8
You can backport/adapt your project to a previous Laravel version, or change hosting provider.
If you choose to backport your project, you can create a Laravel project using an older version, with this command:
composer create-project laravel/laravel:^8.0 example-app
Than you can start copying your models/routes/controllers/etc. and test for any newer feature you might be using that is not supported on the older version.
When, and if, you find an unsupported version, you will need to workaround it yourself.
reference: