I haven’t seen Mikrotik widely deployed here in Australia. Our market is largely dominated by Cisco, with Palo Alto, Fortinet, Juniper, and HPE also quite prominent. Interestingly, HPE is actually in the process of acquiring Juniper in a US$14 billion deal.
There was a recent Mikrotik discussion thread on one of our largest Aussie network engineering forums:
https://forums.whirlpool.net.au/thread/3jm62vnj?p=-1