Hi @Jonny ,
basically Azure VM SKUs should be available in the Azure region "Taiwan North" with a limitation -> "** These regions are currently only available to early access customers".
See Product Availability by Region -> Select Taiwan North and scroll to "Virtual Machines" in the table.
I don't know if you are part of the "early access customers".
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten