When I relaunched from the About Brave screen (which told me I was “almost” up to date)
it updated to: “Version 1.18.70 Chromium: 87.0.4280.101 (Official Build) (x86_64)”
When I later checked About Brave again I saw the same “almost” up to date message, and the version displayed to update to this time was 1.18.75.
Why didn’t Brave update to 1.18.75 when I relaunched from About Brave?