My son has a 2023 GR Supra (BMW Z4 ish) The TCU antennas are also purposed to receive the transmissions from the keyfobs and such, so they've made it so that disconnecting the TCM fucks up the doors (and a number of other systems)
I know in other toyotas parts of the stereo / audio break when you disconnect the TCM.
Manufacturers need them to stay in place, because they make money selling your data...
https://www.moneygeek.com/insurance/auto/driving-data-insurers-privacy/