Question in the title. Feel free to include details, like what networks have wifi, what kinds of devices are on what, etc etc.
Right now I have 4 VLANs, each with a separate wifi SSID:
- Base - servers, workstation, and any trusted devices
- Business - work laptop, dock, and phone - enforces network and device isolation - lighter adblocking settings, so that work programs and services aren’t nerfed
- Isolated - visiting friends and family use this one - again, enforces network and device isolation
- Security - for cameras, doorbell, and other security devices - strongest security settings, isolation, and no direct internet access
Looking forward to hearing what others are doing, to see if I can improve my setup.

Imma shame myself now publicly.
Got 3 Wifi SSIDs, one for internal, one for legacy internal (2.4 only - mostly IOT), one for guests (and my work devices)
AP and FW are from Unifi and i made the guest wifi to be with client isolation.
My entire internal network is one vlan and one subnet.
I plan on fixing that, but yeah…
I’ve got a synology nas that got its webserver ports exposed and synology photo backup ports.
I plan on putting it similary like you, when i get time and a cheap managed switch.
Regarding your setup: i think it is pretty strong, only a dmz for externaly reachable stuff is missing. But the rest? Pretty decent!