They can probably route it, but the bridges between two slots or slot and edge may be too narrow.
Some cheap manufacturers explicitly tell they charge for two boards if they find that. Some customers cheat by adding extra tracks between pins of different boards, and because the manufacturer can’t know what they are for, they have to handle them as one board. You have to decide by yourself if your conscience allows it. Or you can just try your luck with two obvious boards and see if they really charge extra. They don’t necessarily do it, especially when your smaller board wouldn’t give them any benefit for panelizing. It already uses the space economically.
I’ve done this many times prior to machining my PCB’s. So, it was decades ago but, most fab houses do it - just need to verify with them re specifics requirements (they may have some…).
Yes, use the Edge-Cuts layer.
Aside from obvious need for details in a Purchase Order, a Sketch/Drawing is recommended to avoid mistakes.
Can be as simple as this (though, presented to you for the post, is crude)…
I dug into my paper archive and grabbed a simple PCB drawing (for a catheter interface I have patent on so, no legal problem posting it).
You can provide minimal info to very detailed… Generally, a PCB fab house, such as JLPCB/etc has enough Quality Control/Assurance. etc, etc, etc. Such that, other than specific’s, such as detailing these cutouts/etc, they prefer minimal confusion and need for back/forth emails…
Attached shows how I did PCB’s 30 yrs ago… and, because I make my PCB’s for past 25 yrs, I don’t know what the current-day geeks do… you’re on your own!
ADDED: You can ‘Plot’ a b&w PDF drawing with/without comments. Then, Edit it in desktop app (such as Libre Office) to add comments, dimensions, etc… (stuff you might not want to add with Kicad’s PCB “Text” tool…
as I live in europe, I’ll maybe outsource the manufacturing closer, I believe Altair is a german company providing such services, I’ll check with them their requirements
Note 3 on the schematic reminded me of another recent thread about ‘mils’ and ‘thou’. I wanted to make a joke about metric prefixes on imperial units (Megapint anyone?), but I never saw μin (micro-inches) used before.
More importantly, was it used correctly?
A milli-inch would be a mil, so a micro-inch is 0.001 mil. Did you really (intend to) specify 200 μin = 0.2 mil (or about 5 μm) plating? Same goes for 50 μin = 1.25 μm? Seems thin to me, but what do I know - I didn’t make up the specs Edit: nah seems fine for plating thickness, the sub-mil figures threw me off.
I would suggest to order two separate boards. The cost of shipping likely exceeds the cost of having that small board as a separate PCB on the same order.