The RS485 interface of MCU stm32F373 does not work if I select the parity on none however the same software works on stm32L4RCC

[Tesla DeLorean]

Ok, you've made a declarative statement.

You'll likely need to debug it further and scope the outputs to understand the nature of the issue.

The USART implementation on L4+ devices is significantly more complicated than the F3 design.