Advice needed:

Is this Anthracnoses? or another dieases???

It is only affecting my Mallika:

Another pic of black dots on leaves, again only on 1 of 4 species

Should I spray copper? copper fungicide?

Hi Tampamango, welcome to gardening in Florida!
In my experience, mangoes do better planted in the ground. Even the so called condo mangoes struggle in pots. Be careful about watering them, do not over water and it is a good idea to spray them with copper, they are finicky and prone to disease when young. Try to isolate the mallika mango from the rest, just in case. For some reason or another this variety is more prone to disease, I like the taste and the small size of the fruit.
You have some work to do in the future, if it gets colder in your area you have to protect them, for now we are all safe from the freezes.
For container growing, I would pick a fig any day, easy breezy.:)

Silvia

I do not believe that the flowers are infected with anthracnose. Check out the link at the end. I'd look closely at those white spots on the leaves though; might be scales or mealy bugs. Wipe them off if you are not sure.

Link

so yes it is possible to grow mangoes in the greater Tampa area

Pot grown

I almost never water them

with our recent deluge they've seem to grow at an even faster rate