The use of the term "Pom" in Australia has evolved over the years and can have different connotations depending on the context and the speaker's intent. In general, it is considered a friendly and humorous way to refer to British people, but it can also be used in a pejorative or derogatory manner, particularly when used in a derogatory context.
It is important to note that the term "Pom" is not universally liked by British people, some may find it offensive, so it is always best to use it cautiously and be mindful of the potential for causing offence.