Bone broth not actually rich in minerals?

I’ve been doing a bit of research on hypophosphatemia and refeeding syndrome. This sub often seems to advocate for having bone broth during extended fasts to keep phosphate levels normal.

But everywhere I look, the phosphorus levels in a cup of bone broth are wayyyy less than the daily recommended intake, e.g. 0.01g vs 1g. Even if you have a few cups, at most you’re getting a few percent of your daily recommended intake.

I know that the daily recommended minerals assume a normal balanced diet so they can’t necessarily be used to figure out how much you should be taking in as supplements if you’re fasting, but considering the difference in the numbers, does bone broth even do anything for your phosphate levels?

I’m not saying bone broth isn’t healthy, but if the goal is to keep your electrolyte levels in normal range, it doesn’t sound like bone broth has an appreciable impact.

I may be making some bad assumptions here; this is not my area of expertise, so please feel free to correct me!