I hate Samsung and their dumb software design choices, and this is one of them. Why do I need a SIM card to enable a hotspot whereas every other phone works without one?
This phone is broken (broken screen) and was given to me, so I figured I'd use it as a WiFi extender, but I guess I can't.
Agreed, it's the wifi sensor that can't both act as a signal emitter and receiver. (If you know what I mean, I know that it can do both of those things to communicate, but only for a single use case)
Well to be fair, on my pixel at least, those are literally the same setting. Which it actually is just depends on if you're currently on WiFi or not. Kinda Google's fault for labelling it like that.
There's Bluetooth and USB (with Ghirehtet over ADB or external wireless/Ethernet card) that you can use to make a Wi-Fi internet hotspot without mobile data. Also, you could NOT connect to the internet and use LAN-based apps (KDE Connect, network printers) without extra hardware in a pinch, or just broadcast an SSID in a public space for fun.