Hardware
Write down CPU, GPU, RAM
Without hardware, no one can tell whether the problem is a game issue or a device limit.
Performance triage
Paralives low FPS: compare settings, lot size, and save state.
Low FPS reports are only useful when they include hardware, resolution, graphics settings, lot complexity, and whether the problem happens in a fresh save.
Checklist
Performance checks that actually compare something.
Change one variable at a time.
Scene
Compare a small lot and a busy lot
Lot complexity, object count, and Para count can change the result.
Settings
Lower one setting at a time
Record resolution and quality settings before claiming a fix.