Ultimate Immersion Pack PE 1.18+

Convert it through this app before running it

Ultimate Immersion is the king of all realistic resource packs because it can literally be confused with real life, the textures are tremendous and are very good looking, the author focused on making the pack as modern as possible, you now have sinks and bathrooms (included on the mod). All this was created from scratches and not just copy-pasted on Minecraft, it's like a metaverse world where you can just create your own surroundings and design it as you please, it's preferred to use the author's map to display the best highlights about this pack so don't forget to snatch that too when getting the pack. One of the reasons behind the staggering graphics of this pack is the resolution, Ultimate Immersion has a very high resolution climbing up to 1024x, but you wouldn't be able to run that unless you have considerable gear.

This is a Tutorial of how you can install texture packs onto MCPE:

Find games/com.Mojang/Minecraft pe on your phone create a folder called "resource_packs". You can place unzipped custom resource packs here.