How would the tap tempo be sent? As MIDI clock, or Control Change messages, or something else?
Presently the firmware doesn't process MIDI clock, but with the upcoming OpenWare firmware you will be able to receive MIDI messages directly into the patch.
Meanwhile if you want to use a CC value as the tap tempo control, then you can simply pick a CC id that is mapped to an OWL parameter (see https://hoxtonowl.com/mediawiki/index.php/MidiMappings).
You could even use CC 25, PATCH_BUTTON, which the patch sees the same as a button press. Then the tap tempo factory delays (Tap Tempo Stereo Delay and Tap Tempo Ping Pong) will work out of the box.