Hello there,
Your fields that you are using are strings, not numeric, thus you only have the count or distinct count option. You need to convert these to numeric (go to the Modeling tab and change the Data Type) and then you can perform aggregations like sum, average, etc. If there is only one value per X axis increment, then these aggregations will return the actual value.
Similar discussion here https://community.powerbi.com/t5/Desktop/The-real-actual-value-not-the-count-of-values/m-p/131483#:\x7e:text=You%20need%20to%20convert%20these,will%20return%20the%20actual%20value
Hope this resolves your Query !!
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