Found this thread in the Trip Reports
First trip to the final frontier - 8 night Alaska - 9/11/23 - completed
Here’s the photo from their Glacier Day with ship location.

From the post : “I got onto the internet briefly to try and figure out where we were exactly as the captain had said we would be going to Endicott Arm.”
When I read that, it sounds as though there are options. I guess one option is not to even see a glacier.
Further digging, I think that going up the Endicott Arm to see the Dawes Glacier is the intention. But they have opted to refer to the day as simply Glacier Viewing in case they can’t get a good look at Dawes Glacier.
There are other cruise lines that were scheduled to be in Tracy Arm on various days this summer. Looks like Carnival Spirit was in Tracy Arm today. There itinerary was Tracy Arm/ Endicott today. Leaves them the option to pick the more favorable experience, just like Disney calling it Stikine Icefield/cap.
Another report from 2023:
Wonder-filled first-time cruise to Alaska! (2023 6/12-19; Completed 9/26)
They went up Tracy Arm. It’s possible that reaching Sawyer is more difficult due to seals.
Sometime between 2019 and 2023, there’s been a return to Tracy Arm on some
DCL cruises.
I found this one in a search on this forum, using Tracy Arm.
And both referenced reports were in the Trip Reports section.