no EPG for some channels

Hi,

I'm running Kodi 17.0 with VDR VNSI and DVB-S2. EPG is running out of the box and showing information for my channels but not for all of them. I have some (regional, private and public) channels that show no EPG data.

Some channels without EPG data:
SAT.1 NRW
RTL Regional NRW
ProSieben
kabel eins
EinsPlus HD
ZDFinfo HD
zdf.kultur HD

Why is there no EPG Data? I think, private channels should get EPG data and therefore maybe the channel name should be a little bit different, but where can I find correct channel names to get EPG data?
What about special regional channels? How can I get EPG data for them or where can I find information if EPG is available for these channels?

Thanks!