I have started the process. The first thing I’d recommend is that you get a verified Gov.id account for yourself & your mother. Both attorney (you) and your mother (donor) will need a verified Gov.id account to do it online. If you are going to have more than one attorney, they will need a verified Gov.id account also. I set up my parents Gov.id accounts. Take a picture on both sides of her social security/welfare card (travel pass card). You need an email and mobile number to set up an account. I used my mobile number for their accounts also because the account needs to be verified by codes sent to mobile. This can be changed afterwards. The hardest part is getting the Gov.id accounts set up for all.
You will then be able to log into DSS with the Gov.id verified account. You could log into it as your mother (with her permission) and create the Enduring Power of Attorney. The DSS website has 22 minute long video showing you the entire process. Things have to be done sequentially so make sure to watch the videos and read all supporting information.
Good luck creating Gov.id accounts. I can give more information once that’s completed