my samsung phone gives me several options (charging,mtp,rndis,etc…)
its surprising that your tethering is off. it might seem that its considered a seperate technology.
edit: “RNDIS linux module is being deprecated and will be removed from the Linux Kernel in favor Network Control Model (NCM), but it is used by majority of devices nowadays (2023) and up to now the only way to configure working USB tethering for old Android devices.[1] For more recent devices (Android 14 era) try to use “Network Control Model (NCM) support” module first.”