If I were you, I would fork the zizaco/entrust package and get it working with Laravel 10, and have your app use that. It is unlikely to need a lot of changes. At least it has some tests!
Alternatively, you could migrate your app to use another, better supported package like Spatie's laravel-permission, but that would probably be a lot of work.
Migrating to a supported package (or building your own system) is probably something worth doing in the long term anyway, but if you're in a rush to upgrade, then forking is probably the easiest and quickest option.