I can also confirm this issue. Bedrock 1.20.15 Realm. When ender pearling through our single End Island gateway we are teleported to a block under near the corner of the Overworld return portal (in Endstone). I am on PC with W10 and other Realm users (XBox and Switch) have the same result, while xbox user did report being teleported to 0,0,0 and died in void. I can provide world copy if necessary. The end island gateway did originally work for all realm users, this may have been at 1.20.0 (not sure). This is our single and only end island gateway on this realm.
I can also confirm this issue. Bedrock 1.20.15 Realm. When ender pearling through our single End Island gateway we are teleported to a block under near the corner of the Overworld return portal (in Endstone). I am on PC with W10 and other Realm users (XBox and Switch) have the same result, while xbox user did report being teleported to 0,0,0 and died in void. I can provide world copy if necessary. The end island gateway did originally work for all realm users, this may have been at 1.20.0 (not sure). This is our single and only end island gateway on this realm.