In “Learn Raspberry Pi Pico W with MicroPython” Ebook.
I2C:  You can use two different buses (I2C1 and I2C2) simultaneously, but you can’t use two I2C1 or two I2C2 at the same time.
SPI: You can use two SPI buses on different peripherals simultaneously, but you cannot use two buses on the same peripheral at the same time.

That mean I cannot use SPI/I2C buses on the same peripheral at the same time .What about  shared SPI/I2C ?
Could I use Multiple Devices via SPI/I2C buses on the same peripheral at the same time ?

UART: Similarly to I2C and SPI
cannot use two buses on the same peripheral at the same time,right?.

UART, I2C and SPI in both ESP32,ESP8266 has Similar concept as in Raspberry Pi Pico ?