If you have Magenta Gaming from Telekom, you can give the Ps4 Hotspot and play Fortnite and WOT etc without wasting any data?

Thank you in advance

You will need exactly the same amount of data as when playing with a Wi-Fi or whatever.

Because over hand I have in the contract in it, I do not consume a data volume but I do not know how it works

This only applies to apps that you use on the phone, looped data from the hotspot of the phone does not count.

How do you have no data volume or you have unlimited data volume or what do you mean

No you can't.

In order for it to work, the game provider has to be in the affiliate program of Telekom for the first time. In this case, you would be lucky, since both Fortnite and World of Tanks fall under it.

But. And now comes the big but. That goes for the mobile apps. And only these. When the PS4 accesses the hotspot, no matter what you do, it will regularly use your available data volume. The data saving you have exclusively on the smartphone / tablet playing.