Importing worlds in Minecraft on Android: missing "games" folder

Solution 1:

If you have any worlds saved, delete them. Afterwards, an option will pop up to change where world are saved. Change that option to external and the folder will be created after restarting the app.

Solution 2:

After you download the app simply go into "settings" in the app you can enable "show hidden files" which will let you see the "games" folder and everything inside it. Perhaps try downloading a different file manager app if you can't unhide your files. I use the File Manager app so whatever app you use might not have the exact same procedure, though you can download and install worlds from from the app I use.