lockdown + egg giving up?

[quackkquack__]

Hello again!!
So I have three eggs in the incubator, two call ducks and one black east indie but we'll be focusing on only one call duck egg (#3) and the black east indie (#6)

They were placed in the incubator the same time, March 14th. They are both on day 23 now and as I went to go turn them, #6 was rocking a bit!! I decided to candle and I can't see anything at all!! Assuming the duckling has taken up all of the space inside + its a darker egg so more difficult to see. This may be a silly question but it feels like every year I hatch ducks, I totally forget what to do!! I planned on putting them in lockdown day 25 (which is in 2 days/Tuesday) but since #6 is already rocking a bit, should I put it in lockdown now?

As for the call duck/egg #3, I don't have high hopes.. The other day when I candled it, I noticed it seemed to have a good amount space left, like it hadn't progressed in the past 2 or so days. Today, I didn't see any movement but the veins are still red and visible. I'm a bit worried it's giving up
I managed to get some pics.. they aren't the best since I didn't have anyone to help and I sorta had to film me candling and then screenshot

 

[quackkquack__]

Welp, bad news. I went to go turn them for the night and decided to check on #3 and the veins are no longer as visble hate to say baby #3 gave up and passed away.
On the brighter side, the east indie is still rocking and I turned it for the last time and will be putting it in lockdown tomorrow (day 24). It'll be a lone duckling for a week or so until the other call egg hatches (since it was put in a week after) fingers crossed everything goes well!! I have a good feeling about the remaining babies.