Zepp app sucks for tracking calories

Im on iOS and i would love to connect lifesum to count calories and get it synced into the zepp app.

Zepp app is good, the only complain i have is where im from no foods are registrered in their database and its a headache to write out all the nutrition labens to it for it to count correctly

Is it possible to make it so i can input the foods i eat on lifesum, and then zepp syncs with that and imports it to its own food intake system?