Earlier quoted context omitted.
"only" If it's to dev a game with your kid, that pricey. Pricier than the console itself. Pricier than to dev for android or iphone, or any laptop. Or the steam deck for that matter. Expensive dev kits made sense for devs 20 years ago, but today they are just a way to lock the ecosystem.
Nintendo doesn't owe you a cheap way to deploy your custom binaries to devices. Buy a Steam Deck if you want that. Build it for Web GL or Android. Plenty of options exist. I'm not sure what OP actually wants here. Even if you can get your game running on your own Switch, it's not easy to get it up on the store.
Nintendo obviously doesn’t owe them that, and it doesn’t seem to be supported. But, this is a good place to cast around for ideas.