Hello friend,
I 'll try to give a comprehensive reply to your question.
Firstly, haven't seen an example of successful run of parallel instances of SWGoH in mobile devices. Probably main reason of this is somehow restricted infrastructure of SWGoH, not because of a "defect" in the mod.
- If you have an average computer, you can utilize any of the android emulators(BlueStacks, Nox, MeMu etc. ) to play with your alternative SWGoH account.
- If you run more than one alt accounts, you can create desired amount of emulator instances and run all of them at the same time and install SWGoH to all of them separately.
- And if you are so invested to game, you can even keep your PC 7/24 on and connect your PC (and use your emulators) from your phone via TeamViewer application and do whatever you want to do with all of your alt accounts.
I hope this message ,at least indirectly, helps you to overcome your problems.
Have fun!
-G