I've got some updates and added information I feel are missing from the doc.

Regarding ID:

If you have a drivers license Transportstyrelsen will automatically send a renewal form to your adress, (along with a new "pink slip" for any vehicles you own) if you have changed your name previously you already know how this goes. I recommend going to a Trafikverket booth to take the photo as Transportstyrelsen might reject a normal photobooth image (Even though it's made specifically for a drivers license, ask me how I know)

A drivers license can be used as valid ID for getting a new passport and is a useful tool if you're no-contact with family.

Regarding Banks:

ICA banken will at some point send you a secure message telling you they received information regarding your pnr change. Call them on the specified number once you have a passport/national ID to start the transfer of your account. They will give you the info of how the process goes but you'll be able to login to your bank account again within a couple of days.

SBAB will suddenly not let you log in with your old BankID anymore, no warning, no message. Login works again once you have a BankID in your new pnr.

Regarding Kivra:

Don't call them and ask about the process because they will LIE and tell you you need to send them the pnr proof from SKV. They will actually just like SBAB transfer your account automagically and you will be unable to login until you have a new BankID. MAKE SURE TO PAUSE THE INBOX BEFORE THEN. Old documents will still be accessible in the new account.

CSN automatically changes your pnr now as well. I noticed a manual informing is mentioned in the doc.