GPD Win Max 2. A very capable 10" laptop with controller built in. It's very versatile and extremely portable. Emulates everything very well. Nothing like having everything you've ever played or want to on a 10" hand-held. I use it for work too. They just released a smaller device too, just as capable, but with fewer stage options.
I recommend them if you have the means and can do your own repairs. They're definitely great when they work, but there are a few times where QA and customer service isn't the best. It's a very niche product, so that's par for the course.