This was what I used years ago. But the APK is too old now. https://github.com/hansoochan/DSdroid
I usually recommend using open source software but this is c/piracy, so, you can easily find Drastic unlocked on Mobilsm.
There’s a port of melonDS to Android at https://github.com/rafaelvcaetano/melonDS-android. Keep in mind you’ll need a CPU capable of running AArch64 instructions and a 64-bit OS if you want dynarec support.