@startuml test-par
!theme mono

participant "Service" as Service
participant "Repo" as Repo
database "DB" as DB

Service -> Service: test
activate Service

    par
        Service -> Repo: query1
        activate Repo
        Repo -> DB: SELECT 1
        activate DB
        DB --> Repo: result1
        deactivate DB
        Repo --> Service: data1
        deactivate Repo
    and
        Service -> Repo: query2
        activate Repo
        Repo -> DB: SELECT 2
        activate DB
        DB --> Repo: result2
        deactivate DB
        Repo --> Service: data2
        deactivate Repo
    end

Service --> Service: done
deactivate Service

@enduml