The only version available for the Nintendo Switch is "The Complete Adventure" physically, it is no longer on the eShop as of June 25th, 2019. S1 & S2 episodes come pre-installed. Thee Switch cartridges should work just fine on the Switch 2, but since you can only use cartridges to play the game on that console (and cartridges are outrageously expensive), we can’t really give a detailed report as to how the game runs/functions, as our resources are limited.
Here is a good guide to hack your switch (Make sure to remove the web.archive.org part of the link when going on Github pages). Here is a guide to load Switch games.
Get the games at nxbrew.com or nsw2u.com, and make sure to use an adblocker. Use a hacked/modchipped Switch to boot the .xci or .nsp file. The method I recommend is via Tinfoil. S2 episodes come pre-installed, which will save you downloading the episodes.
Warning! You probably know this already, but having a hacked Switch may get it banned from accessing the internet and Nintendo’s servers if you do not have the default.txt in atmosphere/hosts and the exosphere.ini on the root. I’d recommend keeping all your hacked stuff on your emuMMC and your legit stuff on your sysMMC. If you have a patched/OLED Switch, you can put in a modchip, but you need some soldering experience and you risk bricking your Switch.
Download from nxbrew
Download from nsw2u
Note: There is no jailbreak for the Switch 2 yet as of writing this. Your only option to play the game is through cartridges or the MIG Switch, which has a high chance of getting your console banned or becoming unusable.