it should have had it. They removed it in 2019 sometime. If you bought your car new, from tesla, and it was a 2018, then it should have had it. If you bought your car from a third party, like I seem to remember (but may be mis remembering), then whomever traded it in did this exact thing this OP is suggesting doing.
All 2018 model 3s came from the factory with it but people could have removed it.