Russ Allbery:
I'm not sure off-hand if GitLab also has incremental and commit-by-commit review (I would know this if I did more GitLab reviewing, but I haven't done that in quite a while, again just due to lack of time).
I think it has something like that since you can go to https://salsa.debian.org/debian/routine-update/-/merge_requests/17/commits and being able to click into each commit from there. From the MR, there is a "Commits (N)" tab if you don't like constructing URLs manually.
Not sure if it is at the same level as GitHub commit-by-commit review feature, you can at least see each commit in the MR.
Best regards, Niels
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