All of the BT+wifi chips I’ve worked with require active initialization of each feature; you have to signal the chip (over i2c or SPI or whatever) with what kin

All of the BT+wifi chips I’ve worked with require active initialization of each feature; you have to signal the chip (over i2c or SPI or whatever) with what kind of BT operations you want. No BT stack in your product, no BT radio initialization, no BT/wifi multiplexing. At least in the (admittedly limited) chips I’ve worked with.