SPI using Registers in STM32H7 - There is no SPI1->DR (like in STM32F4)- only

I tried to follow the SPI transmit using Registers https://controllerstech.com/spi-using-registers-in-stm32/

look like in STM32H7 , it is changed significantly

for example SPI1->SR => SPI2S_SR.TXP

SPI2S_SR. EOT

EOT: end of transfer

TXP: Tx-packet space available

In general, it is so complicated for a new person when studying STM32H7. I tried to find a simple example related to LL library or register to improve the SPI speed.

Does anyone have any example or give me a hint to understand how to transfer and receive SPi with high speed (HAL is sooooo Sloww) ?

Thank you guys so much