The author of the mod Pocket End Portal, apparently, also does not like to look for a Fortress in Minecraft Pocket Edition. He realized the possibility of creating a portal to the Edge in Minecraft for Android, and consisting of only one block in size.
By creating a mod portal, you can remove it and put it at any time, as you wish in Minecraft on your phone. For Pocket End Portal to work properly in MCBE, be sure to activate the experimental gameplay features.