All my 2FA authentications were linked to this SIM card, including all my internet banking services and other payment systems. Fortunately, I had some money set aside for emergencies. I also utilized this mobile number for various online services and relied on it as my primary method of communication.
It’s inconvenient, but surely you’re able to pretty easily get the number ported to a new eSIM…? You should still have the account and basically should just need to find some WiFi to download it on a different device?
I travel a fair bit, all this makes me think how hard this would be if I was in, say, Europe and my phone was stolen - to get a new physical SIM I’d need to visit a physical store in Australia! Perhaps I could have a family member visit and send it to me in the mail, but in just a slightly different situation the physical SIM is potentially a lot more problematic!