To add to this, for some reason I've found UniPatcher on android easier to use than anything I've done on windows. I would patch the rom on my phone then just transfer it to whatever device I want to play on.
Not a dev for them, just a fan. You may disagree and that's fine.
I have this card, which is A1 and honestly I haven't had trouble emulating anything from NES to Switch. I don't think you need an A2 for emulation, tbh.