Congrats! How amazing! Sounds like it was the right call to go back in :) They are soo adorable. That navel should heal up very soon. May the other two hatch and everyone be safe and sound.
Wow, I’m so sorry. I really hope they’re okay then! They can certainly sit in the eggs for awhile. Checking on them would only be in case they decide they want to hatch early, in which you could be there to help them out.
I haven’t hatched calls, but have hatched other, larger duckling breeds and assisted in this way. This all sounds and looks good to me. I believe you’re doing a great job. They definitely still need some time to absorb. I, personally, might check on them during the night just in case, but you...