Hi @PV and welcome to the Community :),
The STM32WB5MMG datasheet is available here.
As mentioned in this datasheet, the AC Characteristics for SPI, SAI, JTAG FLASH can be found in “Multiprotocol wireless 32-bit MCU Arm®-based Cortex®-M4 with FPU, Bluetooth® 5.3 and 802.15.4 radio solution�?.
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Kaouthar
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