HP - 17.3" FHD IPS Laptop AMD Ryzen 5 7430U 8GB RAM 256GB SSD - Natural Silver

Yes

Generally speaking, any RAM that is not soldered into the MOBO can be upgraded without voiding any warranty AS LONG AS NO OTHER PARTS OF THE DEVICE ARE DAMAGED IN THE PROCESS. This laptop can be officially upgraded to 16 or 32GB, although there have been reports of going all the way to 64GB. Configuration would be 2x8, 2x16, or 2x32GB. Of course, with computer parts being at a premium right now (thank yous to all the AI farms), a 32GB upgrade would cost in the neighborhood of $225-$350 (although you might be able to get some of this back if you sold the 8GB the machine comes with, which would get you back about $65).

Look at the price, far right of the page, top. Under that are availability options for your area (you might have to enable BB tracking your location).

BB's computers generally come with the Home version, with the possible exception of the top of the line or business-oriented computers. You can check the Specs (I'm too lazy, but I'm sure you aren't).

Look at the pricing information on the far right, top, of the page. If you see any choices for open box, demo, etc. models, they will usually come with any original ancillary parts, though sometimes compatible ones will be included. All other, new equipment INCLUDES A NEW CHARGER, WHICH IS HOW ANY REPUTABLE COMPANY WILL SELL IT.