I was cleaning up an older world that I play on with my kids, and removed all of the End Island chunks via MCEdit. After going back through our End gateway, we still teleport to the same remote Island, but the two End gateway portals to bring us back to the main island are gone.
Using the https://mcstacker.net/ /setblock
feature, I was able to get an updated version of the fix mentioned in https://gaming.stackexchange.com/a/324643/220481 for 1.13+
/setblock -77 75 -56 minecraft:air replace
/setblock -77 75 -56 minecraft:end_gateway{Age:0,ExactTeleport:0b,ExitPortal:{X:-982,Y:58,Z:-694}} replace
However, after going through it, there are still no portals on the end island to return. Do I need to run a similar command on the end islands to regenerate those portals taking us back to the main island? Is there any way to have them generated again by the game?
/setblock
fail without an error message.