Not turning up to court ("Fail To Appear") can be an offence in itself.
The court can issue a warrant for your arrest in respect of that.
Governments share information about these nationally.
In NSW, we call that a "First Instance" warrant.
It is possible for you to be arrested on that warrant the next time you come under notice of police anywhere.
This can be for something as seemingly minor as traveling on a train without a ticket.
And is a distinct possibility at an RBT stop (I've known it to happen).
Upon return to WA, you can be expect your suspended sentence to be looked at
by the court that imposed it for any breaches of conditions.
This can result in your sentence being reviewed, the suspension lifted, and the full (or remaining) sentence imposed.
I respectfully disagree with
@Ponala in that I think the chances of you being returned to WA are... at least 50-50.