Exvat has released a new version of Theme Hospital for the Nintendo Switch:

Usage instructions

By default your Theme Hospital game should be located in /ThemeHospital
If you're using an Origin installation copy the Theme Hospital/data/Game folder to the root of your sdcard and name it ThemeHospital
If CorsixTH can't find your installation a dialog will appear that allows you to configure a new location
Both analogue sticks and the touch screen can be used as a mouse, the right analogue stick allows for more precise movement
ZL is mapped to the Right mouse button, ZR to the left mouse button and a press on the left stick to the middle mouse button, the other buttons are mapped to function keys opening various dialogues
You can change the button mapping by editing the CorsixTH/Lua/key_mapping.txt file
Whenever you need to enter information into a textbox simply left click on the textbox to open the software keyboard

https://github.com/Exvat/CorsixTH/releases

https://www.nintendomax.com/viewtopic.php?f=168&t=17006