Hi joanag55068639 , we have set up this parameter to work for static images, gifs and video.
The main body of work here will be with the iOS developers as they will have to use the parameter accordingly to enable each content type.
We were also able to use this functionality to use the new 'thread id' feature which groups related push notifications together. We did this as a work around while we were waiting for this feature to be supported by Adobe Campaign. For reference the Adobe Campaign development ticket for the thread id is 'NEO-11653'. I have been told that this ticket and feature will be worked on by Adobe in April 2019.
Thank you DaveD2018, I changed the connector from binary to HTTP2 and I have the new attributes (mutable content and category) on delivery template.
I have doubts about category attribute because I don't know which values can fill in this attribute. It seems that it is related with Notification Service Extension and Notification Content Extension. Do you know which possibles values can take it? It seems that "image" is an option, any other value?