Potassium quota?

Since the data for entries in the MFP database largely comes from food labels, and food labels aren't required to include potassium (at least not in the U.S.), you're probably getting a lot more potassium than shows up in your MFP food diary.

I try hard to hit my potassium levels as it forces me to think about what veggies and how much I am eating. But as has been pointed out, many of the database entries do not have potassium info. When you are searching the database for a food that matches what you have eaten, try adding the word potassium to it and you can usually find an entry where someone has add the correct potassium to the food item. So, something like "white bean potassium" or "eggplant potassium" will pull up some items with potassium listed. I choose those, but still don't reach my potassium most days.

My understanding is that the most important thing the ratio of sodium to potassium.
Anyways, "potassium supplements" are a joke - check the label. There's some FDA-directed reason for that but I'm not feeling evidency right now. Trust me.

The best way to supplement potassium is to prep your food with a mix of NuSalt (100% potassium) and Morton Lite Salt (50% potassium, 50% sodium).
The potassium by itself tastes metallic but the salt in there makes it a-ok.

A blood test will tell you if you have low potassium. If not, don't worry about it.