How to debug why Dependabot reports no available updates?

[Jackenmen]

I'm not really sure how to debug this, but I've noticed that Dependabot seems to be ignoring some of the available package updates.
Specifically, I currently get no updates here:
https://github.com/Cog-Creators/Red-GitHubBot/actions/runs/23277295771/job/67682903718
But, when I run uv lock --upgrade locally, there are plenty of updates available:

$ uv lock --upgrade
Resolved 46 packages in 696ms
Updated asttokens v3.0.0 -> v3.0.1
Updated attrs v25.3.0 -> v25.4.0
Updated certifi v2025.1.31 -> v2026.2.25
Updated charset-normalizer v3.4.1 -> v3.4.6
Updated click v8.1.8 -> v8.3.1
Updated executing v2.2.0 -> v2.2.1
Updated frozenlist v1.5.0 -> v1.8.0
Updated greenlet v3.1.1 -> v3.3.2
Updated idna v3.10 -> v3.11
Updated multidict v6.3.2 -> v6.7.1
Updated propcache v0.3.1 -> v0.4.1
Updated pycparser v2.22 -> v3.0
Updated pyjwt v2.12.0 -> v2.12.1
Updated requests v2.32.4 -> v2.32.5
Updated simplejson v3.20.1 -> v3.20.2
Updated sqlalchemy v2.0.40 -> v2.0.48
Updated tomli v2.2.1 -> v2.4.0
Updated uritemplate v4.1.1 -> v4.2.0

Here's the link to the config:
https://github.com/Cog-Creators/Red-GitHubBot/blob/main/.github/dependabot.yaml