We have a strict forum food list if you are interested. If you are, email able900 for a copy.
Mushrooms should be avoided throughout the diet and not just a specific stage because fungi can feed on fungi really easily. This is why we don’t recommend eating things that contain molds such as coffee, dried fruits, nuts, etc.
Coffee drains the adrenals, damages the liver and kidneys, and contains molds.
I don’t know where you’ve seen that avocado isn’t allowed on the diet, please share a link if possible.
I am unsure about freezing but soaking moldy items such as nuts in water and then roasting them kills the molds. I believe fire is better than frost.