sx1276 Understanding matching network
VR_PA provides DC biasing for the amplifiers. L1 for example is letting this DC pass but is blocking the RF from coming back to this power supply. L1 and L2 are 33nH (quite a lot). C28 and C9 block this DC from going any further (it's only for the amps).
Moving to the right are what I believe all bandpass filters. Each component has an effect of the impedance. Going through the whole filter, the impedance may land back in the same place, then it's strictly for filtering, otherwise it may be matching from a 50-Ohm transmission line to whatever the rf inputs and outputs of the transceiver want to see in addition to filtering.
Then you have the rx/tx switches and at the end that is most certainly for matching to 50 ohm for the antenna port (although here too, it may serve for filtering as well).
That's about all I know, and definitely let me know if I'm wrong with anything.