I fresh intalled LE10.0.0.4 in Pi2, in Add-ons I can't find "Libreelec module drivers",How to make it show up？
Update to the latest stable LE release. We don't support outdated versions.
The best recommendation we can make is to separate the DVB server functions (hardware with a kernel that supports the drivers you need and tvheadend) from the client (different hardware needing no drivers) or vote with your feet/wallet and either switch to cards from vendors who did upstream support or who package devices for "over the network" usage (SAT>IP, HDHomeRun, etc.) so there's no dependency between hardware and current kernels.
