You likely have a 32-bit userspace because of a manufacturer’s cost-cutting. Install a custom 64-bit ROM (if available for your device).

If you are holding a 32-bit device and find an APK claiming to be "AetherSX2 32-bit," proceed with extreme caution. These are often malware or fake apps

"The performance gap between 32-bit and 64-bit is too wide. Investing time in 32-bit dynarecs yields diminishing returns when 64-bit devices cost $50 used."