Here is a guide I found on reddit. Credits: u/elmosface @NotABird
Most apps are made for phones with bigger screens and the display is usually not optimized for dumbphones with smaller screens. You can change the resolution of the phone but that will affect all apps, even the ones that were originally sized normally. Here is guide to change the DPI for only specific apps (and customize for each app on its own). This will only work on a rooted phone with Magisk installed (maybe I’ll make a guide for that later) and I only tried it on the TCL Flip 2 but it should work on any rooted phone (QIN F21 Pro and the like).
- Download LSposed, SCRCPY, App Settings Reborn and FX File Explorer
- Install FX File Explorer and App Settings Reborn and copy LSposed to your phone storage (do NOT unzip it)
- If you’re using a non-touch phone unzip and run SCRCPY (your phone needs to be in debugging mode to run SCRCPY)
- Open Magisk and tap the settings icon (top right)
- Scroll down a bit and select the option to install Zygisk, reboot the phone after it’s installed
- Open Magisk again and tap Modules (the little puzzle piece on the bottom)
- Select Install from Storage and select FX File Explorer to choose the file (for some reason it wouldn’t show up in the phone’s file explorer)
- Select the LSposed zip file and follow the instructions and then reboot after installing
- LSposed manager should pop up in notifications and you can open by tapping the notification, if it doesn’t show up you can also launch it by dialing ##5776733## (##lsposed##)
- Tap on Modules (little puzzle piece) and activate App Settings Reborn, then tap on Expand and select the apps you would like to give it access to
- Exit LSposed and open App Settings Reborn
- Tap on the app you would like to customize from the list and tap the switch on top to allow changes
- Set the DPI you would like (try 120 and see if you like it, You can always change it) and hit the save icon on top
- Enjoy your resized app! ( you may need to clear the app from recent apps and open it again for the changes to take effect)