I have an Iphone 13Pro and recently I changed my subscription to KPN. I had followed the steps to install the e-Sim by MijnKPN app but I receive a message “This device does not support e-Sim”. I am sure the phone can support multiple e-sims.

I also had tried to add it manually, but it asks me a SM-DP+ that I cannot find. 

Can somebody has an idea how to solve it? Thank you in advance.