Tvheadend

There is a lot of 1 channels but problem is that for many channels you can only find EPG for normal channel and not the +1 channel.
An option to timeshift the EPG with -/ hours for a channel would fix that.
I know i can do that for a whole network but that doesn't work when i only want it for +1 channels.

For m3u playlists i have seen an option it could import from if found.
for example: tvg-shift="+1"