My LG Stylo 6 phone hotspot will not show up on my laptop ( NV57H103u). It shows up on other devices.
Btw, I think that your mobile hotspot might be using 5GHz band instead of 2.4 GHz band.
Older devices can't recognize 5 GHz band.
See in your mobile hotspot settings if you can switch to 2.4 GHz.
Also, 5GHz band is by default in android 11.