I have just found the StructUtils Plugin which is Experimental.
When I give a FInstancedStruct variable Replicated it does not replicate.
Is there any way to replicate FInstancedStruct variables?
for reference:
https://twitter.com/skylonxe/status/1433829202592210957?lang=en
There’s a pull request by @Jambax that adds this. Don’t think it has been merged yet though
It hasn’t, but an engineer has said they will look into once more critical 51. stuff is done.
They did take my Blueprint Graph Support PR fortunately 
Hey there! I was actualy able to take your pr and merge it into 5.1 with success. but as our project is on 5.03 I dont want to upgrade yet.
Just as an exercise I wanted to merge it in to 5.03. of course just replacing the StructUtils ended up in compile errors. any easy way to get rid of the compile errors? Or do the bp graph and replication support rely on alot of 5.1 features that cant be achieved with minor upgrades and/or tweaks?
p.s. by the way thank you for contributing 
! coming from not open source game engines its so cool to see how much impact the community has.