What am I missing in this - Loose host connection - Bridge Networking

Ok.. I am trying to get away from VBox never cared for it anyway, and especially VMW stuff and use the in built stuff, ie: KVM..

BUT

Bridge networking which is ELI5 in both of these is driving me nuts in KVM!

I've tried more sites on doing this than I can count and I finally got some progress with one:

Ok... so I do the "Netplan in *buntu* section I am using Kubuntu 25.04 for this, and I have a reason as to why.. 25.10 and 26.04 have other issues beyond KVM use that I don't want to get into right now, and I'd like to use KVM for some more closer to metal VM's on stuff and testing of 26.04 (which that seemed to explode) too...

So I followed that section.

Got further than I ever got before! I got an active bridge and it pulls IP's from my LAN ! WOOT!

Wompwwmoooomppppp.

where the wheels fall off the bus, I can't access the FLIPPING HOST! Its lost its IP! !? ! WTF is this???

Seriously I have to have TWO NIC's to do this bridge stuff in KVM? Are you flipping serious??? (Can you tell I am PO'd?) Is that requirement listed some place? I sure don't remember that.... and surely that can not be true.

What am I missing in the netplan config to have BOTH the HOST's LAN AND the BRIDGE ACTIVE.

Something tells me that if I have say more than 1 VM, each needs a BRIDGE interface??

Seriously??? Is that true?

I closed all VM and then reconnected the LAN, started VM again, can't connect to the bridge????

What am I missing to get the LAN card in the box to use BOTH the host, and VM's in bridge mode ala VBOX and VMW do. ???

Thanks!