I have had one leaf which had two of these black spots. Now this is the second one where I have one blackish spot (Pic 1). Is this due to fungi? It seems to be embedded in the leaf.
Otherwise, in two other leaves there were yellowish black spots. I have cut away these ones. (Pic 2)
Please suggest remedies too since we have an essentials-only lockdown here so can't get any fungicide.