This is an old issue with new(er) Matomo, there are missing cities / places, since you switched to new dropdown menu items sometime ago. I never had issues before that, and I think there is/was an old issue about this.
Another DST event happened 2 weeks ago, another 1 hour shift in my reports in Matomo is present (again). I adjusted time in system settings, but the issue remained, until I figured it has to be done under Websites for each.
Anyway, is there an option to add a checkbox to turn on/off Auto DST with UTC+N/UTC-N manual shifts selected? Also, some countries consider drop or already dropped DST, that's why it is better to be optional. Thanks!