Hey friend, I have a similar problem. How old is your mother? It's common for older people to resist change. Maybe she prefers regular knives and meat grinders. My mother is very stubborn, for example, and I barely managed to convince her to use new kitchen appliances.
manualmachine.com is a website similar to the one you asked about. It has manuals for a variety of appliances. With the help of this website, I convinced my mom to use the appliances I gave her. I made a spreadsheet with manuals for all the appliances in her house. Fortunately, even though she doesn't like new kitchen appliances, she likes gadgets like phones and laptops.