This was way more confusing than it had to be.
TL;DR: You can lend your digital games to friends & family for 14 days, but both consoles need to connect locally to enable this…(?)
You can’t play digital games you’ve lent out during this time. I guess the point is making it similar to giving your friend a physical game cartridge.
I don’t think you can share with friends? Only if you have a Family account and all the Switches are signed into the same Family.