Hi,
This used to be the case, however IKEv1 is now supported on all SKUs - https://learn.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-about-compliance-crypto#about-ikev1-and-ikev2-for-azure-vpn-connections?WT.mc_id=AZ-MVP-5003469
BGP is supported on those SKUs also - https://learn.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-about-vpn-gateway-settings#gwsku?WT.mc_id=AZ-MVP-5003469