since there are some problem with TVH and dvbapi with German DVB-C network Vodafone/kabel deutschland. I decided to try again VDR afer years with TVH.
I installed VDR Backend from coreelec Repro. With wscan all channels were found and send to channel.conf. But in VNSI front end no channel is listed. VNSI is connected to VDR backend.
Please understand your device is running 19.2 Matrix, NOT 9.2.7 Leia (Legacy).
It is important to understand this difference, and not only for troubleshooting and debugging purposes but also because 9.2.x is fazed out by the end of this year.
From the debug log: 2021-09-15 17:27:40.249 T:4901 INFO : Running on Hardkernel ODROID-N2Plus with CoreELEC (official): 19.2-Matrix_rc3, kernel