hey im gonna post another updated tutorial on youtube for this in 4.26 in the near future.
but heres how you make this work
First of all, ignore every thing you see on the unreal website its very outdated and no longer works
if youre going to put anything on the google play store it has to be android version 29 or higher (current is 30 but idk if that one actually works in unreal yet).
so, you need to download android sdk for version 29 from the sdk manager, download ndk and cmake from the extras section,
you can run the bat files in the extras folder, but they will still download a bunch of outdated sdk stuff as well
if your path for android sdk ndk or jdk has certain non alphabetic characters, this will not work and the error messages will be confusing (so if youre in a country thats not english speaking that can be a big deal).
when you set the sdk location in unreals project settings, you need to go to the platforms folder, then go to the android sdk section and click I agree to the terms and services, then go back to the android sdk section and set it to the sdk folder, then go back to the android section in unreal and click i agree again, this time the button will turn grey
make sure in the android sdk settings and android settings, anything that asks which sdk version choose latest, if it asks for a number set it to 29.
this is the best advice anybody is going to give you. follow the instructions and it will work every time.