403 Error creating dataSource for com.google.blood_pressure in Google Fit REST API - google-oauth

Question

Goal:
I have a simple web application where I submit my Blood Pressure and Heart Rate measurements.
Now I'd like to submit these measurements to my Google Fit Account.
I tried Googles tutorial: https://developers.google.com/fit/scenarios/write-bp-data
OAuth2 Setup
I created new credentials in one of my existing Cloud Console Projects. And then requested a new authorization code using the following scopes (The project is in Testing State and my account is registered as tester):
https://www.googleapis.com/auth/fitness.blood_pressure.write
https://www.googleapis.com/auth/fitness.heart_rate.write
Requesting the token returns the following response:
{
"access_token": "ya29.XXXXXXXXXXXXXXXX",
"expires_in": 3599,
"refresh_token": "1//XXXXXXXXXXXXXXXX",
"scope": "https://www.googleapis.com/auth/fitness.heart_rate.write https://www.googleapis.com/auth/fitness.blood_pressure.write",
"token_type": "Bearer"
}
As you can see, both write scopes are granted.
Additionally, if I check the permissions in my Google Account, both scopes are set.
Create dataSource
Now I create two dataSources (one for com.google.heart_rate.bpm and one for com.google.blood_pressure).
creating the Heart Rate dataSource works as expected, but creating a dataSource for Blood Pressure returns a 403 PERMISSION_DENIED Error:
Request (POST https://www.googleapis.com/fitness/v1/users/me/dataSources)
{
"dataStreamName": "BPA-BloodPressure",
"type": "raw",
"application": {
"detailsUrl": "https://aaa.bbb.ccc",
"name": "Blood Pressure App",
"version": "1"
},
"dataType": {
"name": "com.google.blood_pressure"
}
}
Response
{
"error": {
"code": 403,
"message": "Scope not included to modify data of type com.google.blood_pressure. Possible scopes: https://www.googleapis.com/auth/fitness.blood_pressure.write",
"errors": [
{
"message": "Scope not included to modify data of type com.google.blood_pressure. Possible scopes: https://www.googleapis.com/auth/fitness.blood_pressure.write",
"domain": "global",
"reason": "forbidden"
}
],
"status": "PERMISSION_DENIED"
}
}
The Google Fit REST API tells me that the Scope fitness.blood_pressure.write is missing, but as you can see the Scope is given for the used access token.
Notes
I am working with Postman to test all requests. Later a Java/Groovy or PHP backend will used.
I also tried with read and write scopes for both data types.
I can see my app with both write scopes in Google Fit under "Connected apps".

Answer 1

Change dataType name to "fitness.blood_pressure" instead of "com.google.blood_pressure"
The body will be like this.
{
"dataStreamName": "BPA-BloodPressure",
"type": "raw",
"application": {
"detailsUrl": "https://aaa.bbb.ccc",
"name": "Blood Pressure App",
"version": "1"
},
"dataType": {
"name": "fitness.blood_pressure"
}
}