Make people strike two loose wires together to close the contact instead of a button :D
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I'm using a SmartThings IM6001-BTP01 (zigbee) to do this. Works well. Has been in operation for about 12 months.
Since this is pretty straight forward, I think most any “single click” Zwave switch would work? I love IKEAs stuff but I think it’s mostly Zigbee.
I'm using a zigbee button and it works great, no issues with the device over the winter, though I probably change the battery more than if it was indoors. I would link to the one I'm using, but apparently it is no longer for sale.
I've seen a few people use an Aqara button
Shelly button is waterproof. But uses wifi