BW (BW 7.5) delta data load Procedure after upgrade of source ECC to S/4 HANA

Hi SAP Fans,

we are working on BW 7.5 and we have upgraded from ECC to S/4 HANA .

Delta data extracted already for the datasources into BW 7.5 from ECC till 30th June 2021. There is no data exists in S/4 HANA from 30th June 20201 as the users not yet started posting data.

we have enabled the supported BW datasources as the ODP enabled.

Question is , as the S/4 HANA is not having initializations done for the supported ODP enabled BW datasources , so how to capture the delta data that get posted in the future, do we need to run "initialize without data transfer" to enable to delta data load ?

Please provide your answer or else provide the any documents on BW guideline to be followed after upgrade to S/4 HANA.

Thanks

LN