I am having a similar issue.
I have ATT fiber --> DVPN --> Unifi Dream Machine Pro
I have 3 VLANs...LAN, IoT, and Guest
LAN is my primary and houses all of my PCs and servers
IoT is for TVs, Thermostat, Amazon Alexa, Smartplugs, etc
Guest is for guests on my network with bandwidth limits and filtering for kids.
I only want to pass LAN traffic to the DVPN because I want to block ads on the LAN. When it blocks Ads on the IoT then it screws up my TVs (Samsung, Visio, Sony) which are always talking and the Apps like Paramount +
The only way that I can see to solve it is if the Deeper connect mini had an IP address then I could do IP based traffic routes. Any other ideas...