This shouldn't be too much of a surprise, but it's still important to make note of. If you are planning on buying a Switch Lite, you'll be happy to know that as long as you link the same Nintendo Account, you'll be able to re-download the same titles you have on your Switch. You just can't play the game on both the Switch and Switch Lite at the same time.
Nintendo is working on something to allow transfer of games from Switch and Switch Lite, which will likely handle transfer of other data as well. More details on this transfer option will be shared at a later date.