Not really no vehicles group there

3CB only i have removed the NATO entry that you have set in opcom setup.

Why you mean that we are spamming the forum? where we should write about then if not here?

After 10 min you have

[88,105,0]

Maybe, i am not sure about. Anyway there also not much placement for each sides. After i add mill placement the count of entities has grow up

[57,54,0]

and there will be more after some time due to reinforcement events.
But the blue vehicles groups are not there

Is not, because you have limited the groups count to 20

I think you have answered your question self.
After change to correct faction class you have :

[16,33,0]

16 profiles east
33 profiles west
0 profiles independent

But there are still no vehicles or would be wanilla arma blufor vehicles groups used as you have left there NATO faction as main OPCOM faction

I have not write anything . This is all your setup.

I have similar problem some time ago. Have to create config patch to make it working. Since that all is working flawless.

This is because the faction that you selected has only infantry groups. I assume the ALiVE cant work great with such not standardized config.

There are are no groups for OPCOM faction(s) ["UK_3CB_BAF_Faction_Navy_MTP"]! Please check if you chose the correct faction, and that the faction has groups defined in the ArmA 3 default categories infantry, motorized, mechanized, armored, air, sea!

What exactly your problem are?