In Manual Mode I can control all shifts EXCEPT down to the small ring—but fully up/down on the cogs—that’s a SOLID BLUE light when checking mode on the rear derailleur.

Semi-sync mode seems to be the next best thing with 2-blue flashes when checking which mode your in. But per your link above—seems only full SYNCHRO is available is how I read it on a TT bike.

3 blue flashes is full Synchro Mode which I don’t care for.

Thanks for the response. It would be nice to have Shimano update the firmware (if this is possible with mapping maybe) so that if you held down BOTH buttons it would go to the small ring. Haven’t played with the mapping in E-TUBE app yet. Miss the control of WIRED shifting but enjoy the benefits of electronic shifting too.