PHP 8.2

I have some question: my application use _remap and autoroute legacy, 
MY app have ~250 routes

How is the best way to replace _remap and replace old legacy autorouting?

Auto-route legacy can be used in v4.3.

Auto-route improved does not support _remap() intentionally,
so you need to use Defined routes.

The following command shows all routes. Define all routes with reference to them.

Code:

$ php spark routes

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper