Issue:

The erase sector API does not work, it does not erases the mentioned sector number.

You can try this yourself by including this piece of snippet in a code.
    Flash_offsetToSectorPage(gFlashHandle[CONFIG_FLASH0], offset, &sect, &page);

    status = Flash_eraseSector(gFlashHandle[CONFIG_FLASH0], sect);
The offset value can be as simple as (0x200000)

Additional Comments:

The API Flash_norOspiEraseSector executes properly with no failure returned, but with DAC enabled, we do not see the values 0xFF. The values seen is 0x00.

NOTE: The offset used here is 0xF80000 to match the offset customer is using for the same NOR Flash part.

Attached Project:  [^ospi_flash_io_am64x-sk_r5fss0-0_nortos_ti-arm-clang.zip]