I understand that i do not have a 12t but it was meant generaly.I don't think you understand how gearing works.
Your cassette doesn't have a 12t sprocket.
If you're not using your smallest two sprockets on an 11-46 10 speed cassette you could be running a smaller chainring and smaller range cassette with a smaller largest sprocket. Eg. 11-36
I absolutely DO need my 11t
My HT is a 20 pounds bike 11S 10/42.
My Ebike is not SRAM.
I know i could go 34 with 11/42 but i bought it new and i am using what i paid for.