

In theory, sure,
In reality, I promise you no overworked restaurant staff wants to bother with updating a website daily on the off-chance someone needs to know the soupe du jour. You’d probably just get the wrong information because no one updated it.
If you absolutely must know the soup availability, you can always just call the restaurant. The employees will make fun of you behind your back, but they’ll pretend to be glad to inform you!







If the always-available soups aren’t on the menu, I agree that’s dumb. However, I highly doubt that’s what’s happening to OP.