Hello Moriya-san,
The automated function point you were asking about had been discontinued a long time ago. However, there are OutSystems partners who have analyzers that can plug into OutSystems and automatically calculate not just the function points but other metrics as per customer preference. One of these partners is Boncode. They have a tool called "BonCat" that does exactly what you're looking for. You can visit their website as follows:
https://www.bon-code.nl/
If you are looking at comparing apples to apples, Function Point is the best metric. Using AO or Lines of Codes as comparison metric is not going to work for your purpose. AO exists only within OutSystems world, so if you try to compare AOs with others, you will have extreme difficulty connecting the dots.
Counting the actual Function Point is a very difficult task because it requires manual labor and you can make mistakes. Automating them is actually the way to go.