At the moment, I can click the Digital Clock widget to compare my current time to a list of other time zones I've previously selected. Adding another time zone to the list, however, requires me to right-click the widget, go to Configure Digital Clock, click Time Zones, add another time zone, click Apply and then reopen the Digital Clock widget. This process should be easier: ideally, I could click a button in the widget itself to add or manage the time zones directly, just like there's a Switch button for one to change the current time zone.
Thank you for the bug report! However Plasma 6.2.5 no longer receives updates or maintenance from KDE; active versions are 6.4 or newer. Please upgrade to an active version as soon as your distribution makes it available to you. Plasma is a fast-moving project, and bugs in one version are often fixed in the next one. If you need help with Plasma 6.2.5, please contact your distribution, who bears the responsibility of providing help for older releases that are no longer receiving updates from KDE. If you can reproduce the issue after upgrading to an active version, feel free to re-open this bug report.
Reopening after adjusting version.
Yeah, this has been on my to-do list for a while.