Hi Ahmet,
Are you facing any issue replicating SAP standard status field from ECC to CRM? As far as I know BP status from ECC will be replicated into BP status in CRM, so why would you want to copy / paste the same information in multiple fields in CRM?
Could you send a screenshot of the ECC field you can't find in CRM to be sure we are on the same page?
Regards,
Nicolas.