One DC with two subnets - Best practices

Hi all

Our company will expand with a second physical site, and therefore a separate LAN. We already have an Active Directory in place, running on a Windows Server 2022 machine, with DHCP and DNS services. So we will now have two separate local networks, connected with a site-to-site VPN on router/gateway level, and one AD controller.

I was wondering if there is a guide/instructions for setting up such a scenario. Can one AD controller handle this setup? How can I properly set up the DHCP and DNS requests from two different LANs?

Thanks for your help