How do I know if the MagSafe Charger is charging my iPhone?

I just wasted an hour on Apple Support Chat so hopefully someone here can answer my question because they couldn’t.

Does the MagSafe Charger (which came w/ the unremovable cord attached to the magnet which I plug in to a power adapter) supposed to light up, show a charging lightning bolt, charging percentage on the charger, or show any indicator that the charger is charging? How am I supposed to know that the charger is charged so I can then attach it to my iPhone? Do I need a charging stand or anything additional to charge the charger? If so, what?

I have wireless chargers & whenever I’ve plugged them in the charger would light up, let me know it’s charging, & show the charging percentage but the MagSafe Charger is not doing this.

Any help would be much appreciated!

[Re-Titled by Moderator]