LÖVE

I wanted to try and make a F2p game but I have no idea of how I'd do micro transaction verification(verifying that someone has paid for that?... How do you think I should go about doing this?

If i can't figure out a way, i guess i will just make a regular pay once, get all the cards and play model?

You would use a payment processor that can verify if money has been moved for you. There are several of them out there, depending on your company's geographic location. The payment processor would send you a verification token which would allow you to proceed with handing over the goods.

Yes, i understand that, but i was more worried about the implementation in Lõve, there are no paypal or such API's integration for Lõve is there?

You would need to write one.

how would you even write somthing like this? iv been looking into this but how to call stuff (im looking at mobile specificly) but idk how to set a step outside of love2D and into like ios? appdeligate somthing SKProductsRequest somthing SKPayment

You would write a Lua wrapper in C or C++ or perhaps ObjC or Swift that translates to and from Lua data.