Yes — recurring, scheduled queries against each engine, logged consistently, is the entire method; there's no shortcut tool that does this passively yet.
[01]/ the data
What we found
Our own 30-day tracking of 82 companies across 4 engines produced clear week-over-week trend data (e.g. one company's Perplexity citations rose from 26 to 35 in a single week).
[02]/ how to do it
Three steps
Automate a recurring query-and-log process (daily or weekly).
Store results with a date field, not just a current snapshot.
Chart citation rate over time per engine to see real momentum, not noise.