all 3 of these pkgs can't be upgraded due to unmet dependencies, systemd and its friends.

gtk4 is unimportant, not really used for anything, I just had it installed to test some things with it.
The other two are key pkgs for many others.
I have no problem at all with ca-certificates-utils.
For gtk3 and gtk4 this is due of the split of libcolord from the colord package.
I followed the changes.
Just sync and update.
Thanks for the reports btw.
There are more today:
ca-certificates-utils colord colord-sane gtk3 gtk4

But I was too sleepy to investigate last night

Repository : testing
Name : ca-certificates-utils
Version : 20210603-1
Depends On : bash coreutils findutils p11-kit>=0.24.0

I think I found the problem which you don't see now but once moving from testing to stable you will if p11-kit is not upgraded.
Back to work
oups my fault about colord. I didn't paid attention to the depends field on libcolord.
Just sync and update, it should be ok now.

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