SPI multiplexer, Do we have a solution to connect 2 separate SPI busses to a SPI MCU interface? (2:1 SPI multiplexer)?

SPI uses plain unidirectional logic signals, so any analog switch or digital (de)multiplexer would work.

In practice, one typically connects all devices directly together, and uses separate slave enable signals.

Thanks, then I'll go forward with SN74LV4053A.
The busses needs to be separated because of the capacitive load is too high.

ciao
Hanno