The is no direct connection to Apple Health within FulGaz because it only works on the iPhone.
There is a workaround though.
To Solve your problem, upload your rides to Strava, then connect Strava to Apple Health. This then adds your FulGaz data and all your other rides to Apple Health.
To do this in the Apple Health app, go to Your Details > Apps > Strava and turn on the data types you want to add.