There are some yellowing spots on my nasturtium leaves, and I haven’t been able to figure out what they need yet! Any idea what they need? image here

They’re in full sun for half the day and indirect sun the remainder of the day.

I have some plants growing outside and when I was planting a new one, I noticed the soil had a fair amount of white puffy fungus growing beneath the top soil. Do you all have any recommendations for fungicides that are safe for nasturtium and pothos plants?