How do you send actual data from a client to a server?

I’ve been looking everywhere and I’ve followed Unreal Engines blueprint networking tutorial series but I can’t seem to find anything that tells me how to send data from a client to a server (Via blueprints). For example I want to customize my character on my client, then tell the server what my characters appearance is so it can synchronize that with all other clients. This isn’t something I can achieve by asking a listen server to change it via a server activated function as it’s something that is set before connecting to the server and may be something you can save as a profile to load any time from your computer, so I want to send the appearance chosen from the client to the server via INT variables/Linear color variables, etc. How would I go about this? I’d greatly appreciate an answer for this.

did you get a solution for that ? thx u