ICOM advises for TCVR-e IC705 IC7300 and IC9700 improved firmware for FT8 mod. The first firmware for IC-705 should be available at the end of January. The update availability date for IC-7300 and IC-9700 models is not yet specified. There will be FT8 one-touch mode preset, scroll mode and other updates for each model.
Source: https://www.icomjapan.com/data/Firmupdate_IC705_7300_9700_A4.pdf