Thanks for the response 🙂
This issue seems to have only started now in season 16. I know anyone I add cross-platform can always see when I'm online (which is also really frustrating and I seriously wish Respawn would add the option to appear offline within Apex itself).
But, specifically, my friends who are also on PlayStation always used to appear with green tags on my friends list within Apex. I think since the start of season 16, they have now started appearing with blue tags. I don't know what this means but it seems like I can always see when they are online regardless of their PlayStation status and they can always see when I'm online regardless of my PlayStation status.
I hope the above makes sense.