VPN Domain Routing does not work due to pihole handling DNS separately from the router?

Just wondering if there is a way around this because I'm wanting traffic ONLY from specific websites to go through a wireguard VPN configured on my router, but my pihole handles DHCP and DNS.

There's a few Ubiquiti articles / forum posts that seem to have a similar limitation - is it a technical limitation? I would have thought you could make a rule on the PI to forward DNS requests for a specific domain through to the VPN DNS, and the router would therefore be able to keep the IP of the domain you just looked up and re-route future connections appropriately. I presume that's how it works if the DNS server is local to the router, or am I just talking out of my ass?

For now I've resorted to using IP address in the rules but that doesn't feel ideal