LAWDP and your inspector can tell you to use a meter-main, because that's a code requirement.
LADWP cannot tell you to use an "all-in-one" (meter + main + all your breakers)... that's just you being cheap, or the utility being cheap on your behalf e.g. "most builders prefer..." well of course they do.
That particular one is a dumb choice for you, because it provides what you don't need: 24 breaker spaces, yet ignores what you do need: "Thru Lugs" to carry the full 200A onward to your other panel.
In fact, no one should use an "all-in-one"
And the reason is the changes happening in California with V2X - Vehicle To Home/Grid/etc. Also, PowerWalls and other 21st century approaches to grid-down living. All of these things require inserting an isolation switch between your meter pan and the breakers that you want protected - including your solar if you want that to charge batteries during grid-down. (the main breaker can be on either side of this disconnect, but "utility side" is easier).
The problem with all-in-ones is they provide nowhere to insert that isolation switch. California, where all-in-ones are beloved by builders, is going to pay dearly for that.
Of course, V2X and home batteries are not great news for utilities, which is why we can expect them to "mislead and impede" to the greatest extent possible, e.g. recommending all-in-ones. That's why "a meter collar" doesn't work as a silver bullet for all-in-ones: the utility must approve meter collars, and why would they?
The ranch panel may help, though
This has (optional) meter, main breaker, 4-12 breaker spaces, and most importantly, "thru lugs" to carry 200A onward to another panel somewhere else.
In a PowerWall/V2X environment, everything in the Ranch panel will be on the wrong side of the isolation switch, so make sure everything out there is stuff that's unimportant during an outage, e.g. 2nd EV charge station, air conditioner, hot tub, etc.