Missing silver playstyles from EVOs

Too many play styles already on the players 

Then the player shouldn't be eligible no? it's says "max X playstyles" and the circle is green meaning it's eligible.

Plus it says max 4 PS. my players have not exceeded the max requirement.

Hi, so there are two things that you have to consider. The first thing is the requirement which allows you to put the player in the evo. The second thing is a max cap of playstyles the player can receive through the evolution. In both of your mentioned evolutions the requirement is "Max 4 PS" and the cap is also "Max 4 PS". So you cannot receive the PS as a fifth PS. So it is not really a bug but for me the requirement doesn't make sense. Maybe they will change it. Until then, always pay attention to the max cap first before you activate the evolution. Hope this helps :)

So where can you see the cap as you mention then? because for example i tried to preview the midfield EVO for 10k coins that has "max 4 PS", however when i preview Andrey Santos from Chelsea he has 5 playstyles after the final challenge i.e he get "Longball" added?

You mean the "Midfield Spark" evo, right? So there the requirement is "Max 4 PS" and the cap is "Max 5 PS". The added playstyles are "Long Ball" and "Tiki Taka". If your player has 4 PS before the evolution then he will get "Long Ball" only. If he has 3 PS before the evolution then he would get "Long ball" and also "Tiki Taka". You can see the cap on the console, web/companion app and websites like Futbin. Which one do you use for previewing evos? Then I can explain or send an image.

I used the in-game one on PS5. If you could i would love that so i don't make the same mistake again. Thank you.

I just found it, when it adds a playstyle it shows the number "5^" and like an arrow right? thank you so much for explaining.

Yes, I think you found it! It's the same for stats upgrades where you can see the cap for the stats. I'm glad that I could help :)