Other laptops also have magnets. It’s normally used for the lid open/close switch. And they can be quite strong. Awhile ago, someone found that the magnet in their MacBook Pro was strong enough to trigger the Framework lid switch, if one was placed on top of the other. [Solved, Magnets] Strange electrical behavior? On occasion I’ve used the magnet in the palmrest of my Thinkpad to hold screws when I’m dissembling something.
Honestly, the most common thing people have, credit cards, will probably be just fine laying on the FW16. They use HiCo strips, which require a stronger magnetic flux to affect them. I suspect the line of magnets across the FW16 input deck will be weaker (at the external surface) than lid switch magnets which have been present in other laptops for many years. But if you use old “vintage” magnetic media (like diskettes), you might want to be careful. Some might be LoCo, less resistant. Magnets under keyboard (top deck) and credit cards - #2 by MJ1. This applies to all laptops.