Most pedalboards will not send Sysex, so this will not benefit everyone.
I’m very interested in this upcoming Sysex documentation, myself. One potential (MIDI) Solution is an Event Processor / Event Processor Plus. I have one mounted comfortably under my ‘board, along with two power supplies and a Quadra-Thru box. Powered by the MIDI stream (not from the H9, without modification).
Convert – for example – a single CC value to trigger the Sysex message. But I believe that the EPP will only send 32 bytes – including the leading / trailing F0 and F7. Not sure yet what the H9 string length requirements are.