Is the native cron referred to here the web cron?

I think it's a real (Unix) cron job running locally on an unixoid host.

I think it might be as well but no idea what the syntax would be for that. Especially as there is still no help page

I think a real cron would use the CLI: php cli/joomla.php scheduler:run (without any arguments).

there must be arguments otherwise the cli would not know which task to run.

But do you see my point. There is no way for a user to know this stuff. Especially the way that lazy scheduling works with regards to intervals

I agree there should be some documentation.

there must be arguments otherwise the cli would not know which task to run.

It could run all which are outstanding.

there must be arguments otherwise the cli would not know which task to run.

No, that's the whole point of the component! It runs all jobs - based on the cron syntax of the task, the current time, and the last run time of that task.

The php cli/joomla.php scheduler:run should be run every min of every day * * * * *

Then the component decides which jobs need running - based on the cron syntax of the task, the current time, and the last run time of that task.

"Recommended if triggering with native cron"

This should read, in context with the previous sentence.

"It is recommended TO DISABLE lazy scheduling, if triggering with native cron"