Well, I hope you’re not too disappointed with Gladys… even if it’s the module that’s lacking.
And besides, what a crazy idea to have three-phase power 
Jokes aside, I’ll pass it through a Lixee TIC DIN rail, single-phase, but it doesn’t change much for retrieving the information.
When the guys installed my Linky meter, I asked them to connect C1 and C2 so that I could then connect these two cables (already present in my electrical box) and thus avoid wireless.
For now, I’m using a teleinfo2mqtt docker, but there is now a dedicated integration teleinfo by @prohand.