AD9375: ARM control of enabled signal chains

Hello,

I am trying to change which Tx chains are enabled after device initialisation using ARM control mode. I am on a custom board which does not have the TX1_ENABLE or TX_2ENABLE

Is it possible to initialise the device with both TX1 and TX2 enabled and then, sometime later, disable TX2 using ARM control mode without reinitialising the device?

I think this comment answers my question (by implying it is not possible):

https://ez.analog.com/wide-band-rf-transceivers/tes-gui-and-api-software-ad9371-ad9375/f/q-a/117747/how-to-power-down-tx-output-frequency-on-ad9375-transciever/350712#350712

but I would just like explicit confirmation.

Thanks.