Hello Shaun,
We have not heard much complain about SameSite issue from our customers yet, so it's not affecting Gluu Server much I believe ( otherwise, we would be flooded by complaints from customer base ).
Anyways, we helped one customer to check a quick workaround in apache config, you can also try [that](https://www.youtube.com/watch?v=d9l9UQaoAbo&feature=youtu.be).
Above recorded screencast showing to apply configuration in apache in one test server and few tests as well.