The panel can't just follow the primary monitor because that would prevent people from having panels on every monitor.
Instead the output configuration is done per panel. Right click the panel -> panel -> panel preferences, and then select the output you want.
The panel can't just follow the primary monitor because that would prevent people from having panels on every monitor.
Instead the output configuration is done per panel. Right click the panel -> panel -> panel preferences, and then select the output you want.