1. Largely yes, though there are a number of titles which are currently experiencing issues: Official Compatibility Guide

2. Yes: Official Guide to Transferring Data from a Switch to a Switch 2

There’s a lot of noise and disinformation floating out there, here’s the simplest explanation:

The Switch 2 will launch with three different types of physical cartridges denoted by serial numbers to describe their purpose:

LB - The cartridge will work on Nintendo Switch 2 consoles only.
LP - Game Key cartridges in which a digital download is required.
LN - The cartridge will work on both Nintendo Switch 1 and 2.

Holy crap - that was brilliant, and Amber’s over-the-top reactions were just the cream on top! 👌🏼