Hi,
If your all data sources have delta pointer then please check at source side RSA7.
All data sources which delta pointer was set will be available there.
Check total column have any records >0. if yes then you can pull them into bw thru delta info packs.
Before this issue, any source systems changes were applied.
If you triggered delta info pack, Have you got any delta info pack failures?
if yes then share error messages.
Seems like you are familait about LO and FI Data source extraction settings like V3 job schedule/FI relevant delta settings.
Thanks