OPNsense + PROXMOX + VLANs (again)

[elreyquerabio]

Hello everyone.
I've spent quite some time searching on this forum and other sources ways to properly structure the equipment and systems I'll explain below, but I haven't been able to get it working. I'm convinced that some minor detail is missing, but it's preventing it from functioning correctly. This situation is frustrating.
That's why I'm asking for your help because I don't know what else to try.
We have a laptop with a single NIC, running Proxmox, with OPNsense as main router, in addition to other systems (Home Assistant, OpenMediaVault, and others on standby). The IoT devices at home have grown (now I got 23) and there are two Chinese IP cameras, so I wanted to isolate them from the rest of the network. I wanted to add a guest network too.
At this moment, the system is working like the first picture.
I obviously don't understand how it works (which is embarrassing), because if I set port 1 of the switch to UNTAGGED (as I believe it should be), there's no internet access.
The only thing I can think of is that the tags are being lost through Proxmox, and everything is truly untagged. The connection to the ISP works because it's via PPPoE. Is that correct?
What I'm trying to achieve is something like the second.
But it doesn't work.

HELP!!!!!

[viragomann]

What? Is the pppoe on vtnet0 or vtnet1?

Can you post the Proxmox network and the switch configuration?

[elreyquerabio]

Thanks a lot for the replay.

I've added two pictures with the switch config and here the PROXMOX network config.

pppoe1 is on vnet0 in the config witch is working now.
On the new version (the one that doesn't work) I create one new vnet for every VLAN:
LAN: vnet0
WAN: vnet1
Guests: vnet2
IoT: vnet3
The name vnet0.24 is assigned by the system. When you try to create a new VLAN, a message says that the name has to begin with vlan0