Hello @AbdulRashad ,
My apologies for the delay in responding to your message.
Are the virtual machines (VMs) you've created utilizing the same VNet subnet (aadds-subnet) that Azure AD DS services use? when AADDS resources and VMs are in the same VNet, then peering isn't necessary.
The default virtual network subnet should only be used by the Azure platform to provide managed domain services. Rather than using default subnet for VMs, you should instead create new subnet within the existing VNet described in here or alternatively you could create new Vnet to place your VMs and then create VNet peering as detailed here.
Finally, you'll need to update DNS servers in the peered virtual network as detailed here. I hope this was helpful.
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