That exploit isn’t a full jailbreak. Basically someone found out to use the SmileBasic game to create a buffer overflow and inject their own program into ram. But still no real way to install homebrew as an app and open up the full Switch 2 for homebrew development . Every home brew program in that hack has to be run via the SmileBasic exploit. So unless you installed SmileBasic before it got removed that exploit is basically closed. And Nintendo is going to patch it anyway.

Sorry, but you are just asking way too early. The SmileBasic game was already removed and right now people are researching new exploits. But nothing is promised, and there's no way to know exactly what will develop and what hardware will be compatible.

Not familiar with the Switch 2's eventual region locks, but are those still a thing? On Switch 1 at least, you just had to change your account region in the settings in some browser, no questions asked. Though it wouldn't be the first time Nintendo does console 1 without geoblocking, console 2 with geoblocking, and console 2's backward compatibility without geoblocking (DS & 3DS being the first case).