I cannot select measures that have been defined in a report connected to a Power BI dataset as the field for conditional formatted tables.
Hi @TomSteinbrecher ,
When setting conditional formattings, if choosing "Field value" as "Format by", only columns are available, all measures including those created in current file (in my test, it's [Measure]) or those were generated in the connected Power BI dataset (in my test, it's [count]) are greyed out.
If choosing other options like "Rules", all numeric measures are available.
For the requirement you mentioned above, I would suggest you submit an idea here.