With the Mineral Harvest mod, you will be able to plant plants that will allow you to get resources in Minecraft for Android. The author has provided for this case such a number of plants that corresponds to each mineral in Minecraft Bedrock Edition. By the way, they have a slow growth rate – so that the MCPE is not completely cheated.
Using the Mineral Harvest mod, you will no longer need to wander around the caves in search of ore. Unless you find some structures in MCBE in order to get a free enchanted stuff and pump up the hero. To make the mod work correctly, enable experimental settings.