These are my ini files for a Brandmeister TG to XLX bridge
BM TG <> MMDVM_Bridge <> MMDVM_Bridge <> XLX (DMR Mode)
Had one way audio for a while and was tearing my hair out.. (now have none left :-) )
These might save someone some time.. problem was the DVSwitch ini file where I had to define the TG.. otherwise one way audio..
Remember and setup a static TG on the BM self service page and set your password accordingly.