Hi @João Santos ,
I believe PremiumV3 App Service plan uses the Ddv4-series VMs. You read more about it here.
https://techcommunity.microsoft.com/t5/apps-on-azure/migrate-modernize-net-applications-with-azure/ba-p/1696499
https://learn.microsoft.com/en-us/azure/virtual-machines/ddv4-ddsv4-series
Hope that helps. Let us know if you have further questions
Grace