Hi @Julio Fontoura ,
the Basv2-series is a relatively new Azure VM SKU. The new Bsv2, Basv2, and Bpsv2 VM series were announced in September 2023 for "general available". Announcing the general availability of new Azure burstable virtual machines / 09/12/2023
Maybe the quota is set to "0" by default to get a better control of the numbers of VMs (demand) and the availability of the hardware in all the Azure datacenters.
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten