Thanks for that, hadn’t heard of those. After doing a bit of reading on the internet, they do seem to be way more complicated to set up than a user ID and password, and I’d be scared that I’d lose access to important accounts if I mucked something up - I don’t even know how to scan a QR code! From what I’ve read, I’m unclear if you need a different authenticator app for each account. You can apparently install them on more than one device, in case you lose your phone or tablet.
As for passkeys, I’ve just read up on those as well, and it seems you’d need a degree in computer science to figure out how to use those.
I know I’m clueless when it comes to computers and smartphones, but I’m an expert compared to my sisters - at least I use a password manager secured with an extremely strong password, which is completely beyond their ability.