Second I2S port or using 2 devices on single I2S port


I’m evaluating between Radxa CM3 and BPI-CM4. I want to be able to record and playback at the same time and my plan is to use separate I2S capable ADC and DAC chips.

Radxa has 2x I2S ports so I’m pretty sure it can do it but looks like BPI has only one. Is there a way to get a second I2S port or use the same port for both chips?