Using plantuml.1.2023.1.jar on Win10 64-bit and Linux 64-bit yields different diagram. The Windows diagrams almost seem forced to be "flat" and "left to right direction" (although, not quite the lsame as left to right direction on Linux, if specified).
On Windows, I have tried changing the Java 11 version used (Oracle/Corretto) and even using the "no dot" package with a manual graphviz installation, but the result is the same.
Desire/intent is to have Windows generated images look like the Linux versions.
Windows:

Linux:

PlantUML Code:
@startuml
skin rose
actor :Stakeholder: as stk
actor :TPM: as tpm
actor :CHENG: as cheng
actor :Supervisor: as sup
actor :PLT: as plt
package "System Z" {
component [Subystem 1] as sub_1
component [Subsystem 2] as sub_2
tpm - plt
cheng - plt
sup - plt
plt - sub_1
}
sub_1 - stk
sub_2 - stk
@enduml