Question about Dingz Basic unit for flush mounting

In short: No.

Long: In principle it is possible, but not "out of the box", because as far as I know Logitech has still not managed to implement HTTP requests or WebHooks. It only works with home automation (e.g. Home Assistant) and some workarounds.

PS.: I haven't owned a Harmony for about a year for this and other reasons, so this statement is based on the state of 2018/2019 ;)