Most definitely not a smart meter fire as it is very obvious that there is a CL200 mechanical meter in the can???
now as for the fire, well heat goes up and the burn pattern most likely points to somewhere below this meter, it looks like the SEC's are burnt in two down about where they run through the deck or enter the house, the damage to the SEC at the top of the meter was just the fire burning up, as well as the damage to the outside of the can and meter, if this house was under water (salt) then it could have created a fault between the conductors in the SEC's.
The problem is a photo only shows so much and much would have to be looked at to determine the point of origin, like what does the SEC's look like after it enters the house? Is there damage to the service panel?
But to your question the answer is no as even if there were a smart meter in this can, the inside of the can would have been most likely also damaged, and the CL200 meter was installed at the time of the fire as per the smoke damage to it.
Remember fire burns up not down, and because there is more charing down at the point the SEC's enter the structure, the fire was most likely at this point or below.
Edited to add:
I just noticed what looks like an aluminum tri-plex to the left running through the wall or railing? the end is also burnt off, so maybe it was this wire that started the fire??? who knows?
